Common Tangents and Tangent Circles
|
|
- Silas Washington
- 5 years ago
- Views:
Transcription
1 Common Tangents and Tangent Circles CK12 Editor Say Thanks to the Authors Click (No sign in required)
2 To access a customizable version of this book, as well as other interactive content, visit AUTHOR CK12 Editor CK-12 Foundation is a non-profit organization with a mission to reduce the cost of textbook materials for the K-12 market both in the U.S. and worldwide. Using an open-content, web-based collaborative model termed the FlexBook, CK-12 intends to pioneer the generation and distribution of high-quality educational content that will serve both as core text as well as provide an adaptive environment for learning, powered through the FlexBook Platform. Copyright 2012 CK-12 Foundation, The names CK-12 and CK12 and associated logos and the terms FlexBook and FlexBook Platform (collectively CK-12 Marks ) are trademarks and service marks of CK-12 Foundation and are protected by federal, state, and international laws. Any form of reproduction of this book in any format or medium, in whole or in sections must include the referral attribution link (placed in a visible location) in addition to the following terms. Except as otherwise noted, all CK-12 Content (including CK-12 Curriculum Material) is made available to Users in accordance with the Creative Commons Attribution/Non- Commercial/Share Alike 3.0 Unported (CC BY-NC-SA) License ( as amended and updated by Creative Commons from time to time (the CC License ), which is incorporated herein by this reference. Complete terms can be found at Printed: March 1, 2013
3 Concept 1. Common Tangents and Tangent Circles CONCEPT 1 Common Tangents and Tangent Circles Learning Objectives Solve problems involving common internal tangents of circles. Solve problems involving common external tangents of circles. Solve problems involving externally tangent circles. Solve problems involving internally tangent circles. Common tangents to two circles may be internal or external. A common internal tangent intersects the line segment connecting the centers of the two circles whereas a common external tangent does not. Common External Tangents Here is an example in which you might encounter the use of common external tangents. Example 1 Find the distance between the centers of the circles in the figure. 1
4 Let s label the diagram and draw a line segment that joins the centers of the two circles. Also draw the segment AE perpendicular the radius BC. Since DC is tangent to both circles, DC is perpendicular to both radii: AD and BC. We can see that AECD is a rectangle, therefore EC = AD = 15 in. This means that BE = 25 in 15 in = 10 in. ABE is a right triangle with AE = 40 in and BE = 10 in. We can apply the Pythagorean Theorem to find the missing side, AB. (AB) 2 = (AE) 2 + (BE) 2 (AB) 2 = AB = in The distance between the centers is approximately 41.2 inches. Common Internal Tangents Here is an example in which you might encounter the use of common internal tangents. Example 2 AB is tangent to both circles. Find the value of x and the distance between the centers of the circles. 2
5 Concept 1. Common Tangents and Tangent Circles AC AB Tangent is perpendicular to the radius BD AB Tangent is perpendicular to the radius CAE = DBE Both equal 90 CEA = BED Vertical angles CEA BED AA similarity postulate Therefore, Using the Pythagorean Theorem on CEA : AC BD = AE EB 5 x = 8 12 x = 5 12 x = (CE) 2 = (AC) 2 + (AE) 2 (CE) 2 = = 89 CE 9.43 Using the Pythagorean Theorem on BED : (DE) 2 = (BD) 2 + (DE) 2 (DE) 2 = = BE The distance between the centers of the circles is CE + DE Two circles are tangent to each other if they have only one common point. Two circles that have two common points are said to intersect each other. Two circles can be externally tangent if the circles are situated outside one another and internally tangent if one of them is situated inside the other. 3
6 Externally Tangent Circles Here are some examples involving externally tangent circles. Example 3 Circles tangent at T are centered at M and N. Line ST is tangent to both circles at T. Find the radius of the smaller circle if SN SM. ST T M tangent is perpendicular to the radius. ST T N tangent is perpendicular to the radius. In the right triangle ST N,cos35 = 9 SN SN = 9 cos We are also given that SN SM. Therefore, m MSN = 90 m SMT = = 55. Also, m ST N = 90 m T SN = = 55. Therefore, SNM SNT by the AA similarity postulate. SN MN = T N SN 11 T M + 9 = (T M + 9) = 121 9T M + 81 = 121 9T M = 40 T M 4.44 The radius of the smaller circle is approximately Example 4 Two circles that are externally tangent have radii of 12 inches and 8 inches respectively. Find the length of tangent AB. 4
7 Concept 1. Common Tangents and Tangent Circles Label the figure as shown. In DOQ,OD = 4 and OQ = 20. Therefore, (DQ) 2 = (OQ) 2 (OD) 2 (DQ) 2 = = 384 DQ 19.6 CB AC QB tangent is perpendicular to the radius. AC OC tangent is perpendicular to the radius. Therefore, OCA = QBA both equal 90 OAC = QAB same angle. AOC AQB by the AA similarity postulate. Therefore, QB OC = AB AC 8 12 = AB 8(AB ) = 12AB AB AB AB 4AB AB Internally Tangent Circles Here is an example involving internally tangent circles. Example 5 5
8 Two diameters of a circle of radius 15 inches are drawn to make a central angle of 48. A smaller circle is placed inside the bigger circle so that it is tangent to the bigger circle and to both diameters. What is the radius of the smaller circle? OA and OB are two tangents to the smaller circle from a common point so by Theorem 9-3, ON bisects m NOB = 24. In ONB we use sin24 = NB ON ON = sin NB 2.46 NB. 24 Draw CD from the points of tangency between the circles perpendicular to OD. AOB In OCD we use sin24 = CD OC CD = sin 24 (OC) 0.41(15) 6.1. We also have OB NB because a tangent is perpendicular to the radius. Therefore, OBN = ODC both equal 90 6
9 Concept 1. Common Tangents and Tangent Circles COD = BON same angle. Therefore, ONB OCD by the AA similarity postulate. This gives us the ratio ON OC = NB CD. ON = OC NC = 15 NB (NB = NC, since they are both radii of the small circle). 15 NB = NB 6.1(15 NB) = 15 NB NB = 15 NB = 21.1 NB NB = 4.34 Lesson Summary In this section we learned about externally and internally tangent circles. We looked at the different cases when two circles are both tangent to the same line, and/or tangent to each other. Review Questions CD is tangent to both circles. 1. AC = 8,BD = 5,CD = 12. Find AB. 2. AB = 20,AC = 15 and BD = 10. Find CD. 3. AB = 24,AC = 18 and CD = 19. Find BD. 4. AB = 12,CD = 16 and BD = 6. Find AC. AC is tangent to both circles. Find the measure of angle CQB. 7
10 5. AO = 9 and AB = BQ = 20 and BC = BO = 18,AO = 9 8. CB = 7,CQ = 5 For 9 and 10, find x. 9. DC = 2x + 3; EC = x DC = 4x 9; EC = 2x + 21 Circles tangent at T are centered at M and N. ST is tangent to both circles at T. Find the radius of the smaller circle if SN SM SM = 22,T N = 25, SNT = 40
11 Concept 1. Common Tangents and Tangent Circles 12. SM = 23,SN = 18, SMT = Four identical coins are lined up in a row as shown. The distance between the centers of the first and the fourth coin is 42 inches. What is the radius of one of the coins? 14. Four circles are arranged inside an equilateral triangle as shown. If the triangle has sides equal to 16 cm, what is the radius of the bigger circle? What are the radii of the smaller circles? 15. In the following drawing, each segment is tangent to each circle. The largest circle has a radius of 10 inches. The medium circle has a radius of 8 inches. What is the radius of the smallest circle tangent to the medium circle? 16. Circles centered at A and B are tangent at T. Show that A, B and T are collinear. 17. TU is a common external tangent to the two circles. VW is tangent to both circles. Prove that TV =VU =VW. 18. A circle with a 5 inch radius is centered at A, and a circle with a 12 inch radius is centered at B, where A and B are 17 inches apart. The common external tangent touches the small circle at P and the large circle at Q. What kind of quadrilateral is PABQ? What are the lengths of its sides? 9
12 Review Answers ; Proof 17. Proof 18. Right trapezoid; AP = 5;BQ = 12;AB = 17;PQ =
Two-Column Proofs. Bill Zahner Dan Greenberg Lori Jordan Andrew Gloag Victor Cifarelli Jim Sconyers
Two-Column Proofs Bill Zahner Dan Greenberg Lori Jordan Andrew Gloag Victor Cifarelli Jim Sconyers Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable
More informationMedians in Triangles. CK12 Editor. Say Thanks to the Authors Click (No sign in required)
Medians in Triangles CK12 Editor Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content,
More informationTriangle Sum Theorem. Bill Zahner Lori Jordan. Say Thanks to the Authors Click (No sign in required)
Triangle Sum Theorem Bill Zahner Lori Jordan Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive
More informationSpecial Right Triangles
Special Right Triangles Say Thanks to the Authors Click http://www.ck1.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit www.ck1.org
More informationTrapezoids, Rhombi, and Kites
Trapezoids, Rhombi, and Kites Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit
More informationVolume of Pyramids and Cones
Volume of Pyramids and Cones Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit
More informationUsing Congruent Triangles
Using Congruent Triangles CK12 Editor Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content,
More informationAreas of Similar Polygons
Areas of Similar Polygons CK1 Editor Say Thanks to the Authors Click http://www.ck1.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content,
More informationRelations and Functions
Relations and Functions Brenda Meery Kaitlyn Spong Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive
More informationThe Ambiguous Case. Say Thanks to the Authors Click (No sign in required)
The Ambiguous Case Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit www.ck12.org
More information9 Circles CHAPTER. Chapter Outline. Chapter 9. Circles
www.ck12.org Chapter 9. Circles CHAPTER 9 Circles Chapter Outline 9.1 PARTS OF CIRCLES & TANGENT LINES 9.2 PROPERTIES OF ARCS 9.3 PROPERTIES OF CHORDS 9.4 INSCRIBED ANGLES 9.5 ANGLES OF CHORDS, SECANTS,
More informationSurface Area of Prisms and Cylinders
Surface Area of Prisms and Cylinders Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content,
More informationVolume of Prisms and Cylinders
Volume of Prisms and Cylinders Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit
More informationCongruence. CK-12 Kaitlyn Spong. Say Thanks to the Authors Click (No sign in required)
Congruence CK-12 Kaitlyn Spong Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit
More informationVolume of Prisms and Cylinders
Volume of Prisms and Cylinders Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit
More informationActivities and Answer Keys
Activities and Answer Keys CK12 Editor Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content,
More informationArea of a Triangle. Say Thanks to the Authors Click (No sign in required)
Area of a Triangle Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit www.ck12.org
More informationCIRCLE. Circle is a collection of all points in a plane which are equidistant from a fixed point.
CIRCLE Circle is a collection of all points in a plane which are equidistant from a fixed point. The fixed point is called as the centre and the constant distance is called as the radius. Parts of a Circle
More informationDEFINITIONS. Perpendicular Two lines are called perpendicular if they form a right angle.
DEFINITIONS Degree A degree is the 1 th part of a straight angle. 180 Right Angle A 90 angle is called a right angle. Perpendicular Two lines are called perpendicular if they form a right angle. Congruent
More informationMaharashtra Board Class IX Mathematics (Geometry) Sample Paper 1 Solution
Maharashtra Board Class IX Mathematics (Geometry) Sample Paper 1 Solution Time: hours Total Marks: 40 Note: (1) All questions are compulsory. () Use of a calculator is not allowed. 1. i. In the two triangles
More informationSurface Area and Volume of Spheres
Surface Area and Volume of Spheres Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content,
More informationParallel Lines and Quadrilaterals
Parallel Lines and Quadrilaterals Michael Fauteux Rosamaria Zapata CK12 Editor Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this
More informationnot to be republishe NCERT CHAPTER 8 QUADRILATERALS 8.1 Introduction
QUADRILATERALS 8.1 Introduction CHAPTER 8 You have studied many properties of a triangle in Chapters 6 and 7 and you know that on joining three non-collinear points in pairs, the figure so obtained is
More informationSolved Paper 1 Class 9 th, Mathematics, SA 2
Solved Paper 1 Class 9 th, Mathematics, SA 2 Time: 3hours Max. Marks 90 General Instructions 1. All questions are compulsory. 2. Draw neat labeled diagram wherever necessary to explain your answer. 3.
More informationGeometry. Geometry is one of the most important topics of Quantitative Aptitude section.
Geometry Geometry is one of the most important topics of Quantitative Aptitude section. Lines and Angles Sum of the angles in a straight line is 180 Vertically opposite angles are always equal. If any
More informationGeometry - Chapter 12 Test SAMPLE
Class: Date: Geometry - Chapter 12 Test SAMPLE Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Find the value of x. If necessary, round your answer to
More informationIndicate whether the statement is true or false.
Math 121 Fall 2017 - Practice Exam - Chapters 5 & 6 Indicate whether the statement is true or false. 1. The simplified form of the ratio 6 inches to 1 foot is 6:1. 2. The triple (20,21,29) is a Pythagorean
More informationCONSTRUCTIONS Introduction Division of a Line Segment
216 MATHEMATICS CONSTRUCTIONS 11 111 Introduction In Class IX, you have done certain constructions using a straight edge (ruler) and a compass, eg, bisecting an angle, drawing the perpendicular bisector
More informationUsing Intercepts. Jen Kershaw. Say Thanks to the Authors Click (No sign in required)
Using Intercepts Jen Kershaw Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit
More informationLINES AND ANGLES CHAPTER 6. (A) Main Concepts and Results. (B) Multiple Choice Questions
CHAPTER 6 LINES AND ANGLES (A) Main Concepts and Results Complementary angles, Supplementary angles, Adjacent angles, Linear pair, Vertically opposite angles. If a ray stands on a line, then the adjacent
More information1. Each interior angle of a polygon is 135. How many sides does it have? askiitians
Class: VIII Subject: Mathematics Topic: Practical Geometry No. of Questions: 19 1. Each interior angle of a polygon is 135. How many sides does it have? (A) 10 (B) 8 (C) 6 (D) 5 (B) Interior angle =. 135
More information2. A circle is inscribed in a square of diagonal length 12 inches. What is the area of the circle?
March 24, 2011 1. When a square is cut into two congruent rectangles, each has a perimeter of P feet. When the square is cut into three congruent rectangles, each has a perimeter of P 6 feet. Determine
More informationm 6 + m 3 = 180⁰ m 1 m 4 m 2 m 5 = 180⁰ m 6 m 2 1. In the figure below, p q. Which of the statements is NOT true?
1. In the figure below, p q. Which of the statements is NOT true? m 1 m 4 m 6 m 2 m 6 + m 3 = 180⁰ m 2 m 5 = 180⁰ 2. Look at parallelogram ABCD below. How could you prove that ABCD is a rhombus? Show that
More informationCreated By Shelley Snead January Modified and Animated By Chris Headlee June 2010
Created By Shelley Snead January 2007 Modified and Animated By Chris Headlee June 2010 Lines and Angles both are obtuse angles subtract from 180 x and y form linear pairs with adjacent angles 180 82 =
More information9.2 SECANT AND TANGENT
TOPICS PAGES. Circles -5. Constructions 6-. Trigonometry -0 4. Heights and Distances -6 5. Mensuration 6-9 6. Statistics 40-54 7. Probability 55-58 CIRCLES 9. CIRCLE A circle is the locus of a points which
More informationPostulates, Theorems, and Corollaries. Chapter 1
Chapter 1 Post. 1-1-1 Through any two points there is exactly one line. Post. 1-1-2 Through any three noncollinear points there is exactly one plane containing them. Post. 1-1-3 If two points lie in a
More informationAPEX PON VIDYASHRAM, VELACHERY ( ) HALF-YEARLY WORKSHEET 1 LINES AND ANGLES SECTION A
APEX PON VIDYASHRAM, VELACHERY (2017 18) HALF-YEARLY WORKSHEET 1 CLASS: VII LINES AND ANGLES SECTION A MATHEMATICS 1. The supplement of 0 is. 2. The common end point where two rays meet to form an angle
More informationChapter 6.1 Medians. Geometry
Chapter 6.1 Medians Identify medians of triangles Find the midpoint of a line using a compass. A median is a segment that joins a vertex of the triangle and the midpoint of the opposite side. Median AD
More informationThe Pythagorean Theorem: Prove it!!
The Pythagorean Theorem: Prove it!! 2 2 a + b = c 2 The following development of the relationships in a right triangle and the proof of the Pythagorean Theorem that follows were attributed to President
More informationGeometry: Traditional Pathway
GEOMETRY: CONGRUENCE G.CO Prove geometric theorems. Focus on validity of underlying reasoning while using variety of ways of writing proofs. G.CO.11 Prove theorems about parallelograms. Theorems include:
More informationCBSE X Mathematics 2012 Solution (SET 1) Section C
CBSE X Mathematics 01 Solution (SET 1) Q19. Solve for x : 4x 4ax + (a b ) = 0 Section C The given quadratic equation is x ax a b 4x 4ax a b 0 4x 4ax a b a b 0 4 4 0. 4 x [ a a b b] x ( a b)( a b) 0 4x
More information3. Given the similarity transformation shown below; identify the composition:
Midterm Multiple Choice Practice 1. Based on the construction below, which statement must be true? 1 1) m ABD m CBD 2 2) m ABD m CBD 3) m ABD m ABC 1 4) m CBD m ABD 2 2. Line segment AB is shown in the
More informationExtra Practice 1A. Lesson 8.1: Parallel Lines. Name Date. 1. Which line segments are parallel? How do you know? a) b)
Extra Practice 1A Lesson 8.1: Parallel Lines 1. Which line segments are parallel? How do you know? a) b) c) d) 2. Draw line segment MN of length 8 cm. a) Use a ruler to draw a line segment parallel to
More informationP1 REVISION EXERCISE: 1
P1 REVISION EXERCISE: 1 1. Solve the simultaneous equations: x + y = x +y = 11. For what values of p does the equation px +4x +(p 3) = 0 have equal roots? 3. Solve the equation 3 x 1 =7. Give your answer
More informationMathematical derivations of some important formula in 2D-Geometry by HCR
From the SelectedWorks of Harish Chandra Rajpoot H.C. Rajpoot Summer March 31, 2018 Mathematical derivations of some important formula in 2D-Geometry by HCR Harish Chandra Rajpoot, HCR Available at: https://works.bepress.com/harishchandrarajpoot_hcrajpoot/61/
More informationnot to be republished NCERT CONSTRUCTIONS CHAPTER 10 (A) Main Concepts and Results (B) Multiple Choice Questions
CONSTRUCTIONS CHAPTER 10 (A) Main Concepts and Results Division of a line segment internally in a given ratio. Construction of a triangle similar to a given triangle as per given scale factor which may
More informationCONGRUENT TRIANGLES NON-CALCULATOR
CONGUENT TIANGLE NON-CALCULATO NOTE: ALL DIAGAM NOT DAWN TO CALE. * means may be challenging for some 1. Which triangles are congruent? Give reasons. A 60 50 8cm B 60 8cm C 6cm 70 35 50 D 8cm 40 E F 6cm
More informationQUADRILATERALS MODULE - 3 OBJECTIVES. Quadrilaterals. Geometry. Notes
13 QUADRILATERALS If you look around, you will find many objects bounded by four line-segments. Any surface of a book, window door, some parts of window-grill, slice of bread, the floor of your room are
More informationPerimeter. Area. Surface Area. Volume. Circle (circumference) C = 2πr. Square. Rectangle. Triangle. Rectangle/Parallelogram A = bh
Perimeter Circle (circumference) C = 2πr Square P = 4s Rectangle P = 2b + 2h Area Circle A = πr Triangle A = bh Rectangle/Parallelogram A = bh Rhombus/Kite A = d d Trapezoid A = b + b h A area a apothem
More informationChapter 7 Coordinate Geometry
Chapter 7 Coordinate Geometry 1 Mark Questions 1. Where do these following points lie (0, 3), (0, 8), (0, 6), (0, 4) A. Given points (0, 3), (0, 8), (0, 6), (0, 4) The x coordinates of each point is zero.
More information0815geo. Geometry CCSS Regents Exam In the diagram below, a square is graphed in the coordinate plane.
0815geo 1 A parallelogram must be a rectangle when its 1) diagonals are perpendicular 2) diagonals are congruent ) opposite sides are parallel 4) opposite sides are congruent 5 In the diagram below, a
More informationGeometry Semester 1 Model Problems (California Essential Standards) Short Answer
Geometry Semester 1 Model Problems (California Essential Standards) Short Answer GE 1.0 1. List the undefined terms in Geometry. 2. Match each of the terms with the corresponding example a. A theorem.
More informationConstruction Instructions. Construct the perpendicular bisector of a line segment. Or, construct the midpoint of a line segment.
Construction Instructions Construct the perpendicular bisector of a line segment. Or, construct the midpoint of a line segment. 1.) Begin with line segment XY. 2.) Place the compass at point X. Adjust
More information8.7 Coordinate Proof with
8.7 Coordinate Proof with Quadrilaterals Goal Eample p Use coordinate geometr to prove properties of quadrilaterals. Determine if quadrilaterals are congruent Determine if the quadrilaterals with the given
More informationGeometry CST Questions (2008)
1 Which of the following best describes deductive reasoning? A using logic to draw conclusions based on accepted statements B accepting the meaning of a term without definition C defining mathematical
More informationModule Four: Connecting Algebra and Geometry Through Coordinates
NAME: Period: Module Four: Connecting Algebra and Geometry Through Coordinates Topic A: Rectangular and Triangular Regions Defined by Inequalities Lesson 1: Searching a Region in the Plane Lesson 2: Finding
More informationModeling with Geometry
Modeling with Geometry 6.3 Parallelograms https://mathbitsnotebook.com/geometry/quadrilaterals/qdparallelograms.html Properties of Parallelograms Sides A parallelogram is a quadrilateral with both pairs
More information8. T(3, 4) and W(2, 7) 9. C(5, 10) and D(6, -1)
Name: Period: Chapter 1: Essentials of Geometry In exercises 6-7, find the midpoint between the two points. 6. T(3, 9) and W(15, 5) 7. C(1, 4) and D(3, 2) In exercises 8-9, find the distance between the
More information2.1 Length of a Line Segment
.1 Length of a Line Segment MATHPOWER TM 10 Ontario Edition pp. 66 7 To find the length of a line segment joining ( 1 y 1 ) and ( y ) use the formula l= ( ) + ( y y ). 1 1 Name An equation of the circle
More informationGEOMETRY COORDINATE GEOMETRY Proofs
GEOMETRY COORDINATE GEOMETRY Proofs Name Period 1 Coordinate Proof Help Page Formulas Slope: Distance: To show segments are congruent: Use the distance formula to find the length of the sides and show
More informationedunepal_info
facebook.com/edunepal.info @ edunepal_info Tangent Constructions Session 1 Drawing and designing logos Many symbols are constructed using geometric shapes. The following section explains common geometrical
More informationEUCLID S GEOMETRY. Raymond Hoobler. January 27, 2008
EUCLID S GEOMETRY Raymond Hoobler January 27, 2008 Euclid rst codi ed the procedures and results of geometry, and he did such a good job that even today it is hard to improve on his presentation. He lived
More informationGeometric Constructions
Materials: Compass, Straight Edge, Protractor Construction 1 Construct the perpendicular bisector of a line segment; Or construct the midpoint of a line segment. Construction 2 Given a point on a line,
More informationInversive Plane Geometry
Inversive Plane Geometry An inversive plane is a geometry with three undefined notions: points, circles, and an incidence relation between points and circles, satisfying the following three axioms: (I.1)
More informationGeometry SIA #3 Practice Exam
Class: Date: Geometry SIA #3 Practice Exam Short Answer 1. Which point is the midpoint of AE? 2. Find the midpoint of PQ. 3. Find the coordinates of the midpoint of the segment whose endpoints are H(2,
More informationPOTENTIAL REASONS: Definition of Congruence:
Sec 1.6 CC Geometry Triangle Proofs Name: POTENTIAL REASONS: Definition of Congruence: Having the exact same size and shape and there by having the exact same measures. Definition of Midpoint: The point
More informationGeometry First Semester Practice Final (cont)
49. Determine the width of the river, AE, if A. 6.6 yards. 10 yards C. 12.8 yards D. 15 yards Geometry First Semester Practice Final (cont) 50. In the similar triangles shown below, what is the value of
More informationFor all questions, E. NOTA means none of the above answers is correct. Diagrams are NOT drawn to scale.
For all questions, means none of the above answers is correct. Diagrams are NOT drawn to scale.. In the diagram, given m = 57, m = (x+ ), m = (4x 5). Find the degree measure of the smallest angle. 5. The
More informationProving Triangles and Quadrilaterals Satisfy Transformational Definitions
Proving Triangles and Quadrilaterals Satisfy Transformational Definitions 1. Definition of Isosceles Triangle: A triangle with one line of symmetry. a. If a triangle has two equal sides, it is isosceles.
More informationMT - MATHEMATICS (71) GEOMETRY - PRELIM II - PAPER - 3 (E)
014 1100 Seat No. MT - MTHEMTICS (71) GEOMETY - PELIM II - (E) Time : Hours (Pages 3) Max. Marks : 40 Note : (i) Q.1. Solve NY FIVE of the following : 5 (i) ll questions are compulsory. Use of calculator
More informationGeometry. AIR Study Guide
Geometry AIR Study Guide Table of Contents Topic Slide Formulas 3 5 Angles 6 Lines and Slope 7 Transformations 8 Constructions 9 10 Triangles 11 Congruency and Similarity 12 Right Triangles Only 13 Other
More information2006 Fryer Contest. Solutions
Canadian Mathematics Competition An activity of the Centre for Education in Mathematics and Computing, University of Waterloo, Waterloo, Ontario 006 Fryer Contest Thursday, April 0, 006 Solutions c 006
More informationClass IX Chapter 11 Constructions Maths
1 Class IX Chapter 11 Constructions Maths 1: Exercise 11.1 Question Construct an angle of 90 at the initial point of a given ray and justify the construction. Answer: The below given steps will be followed
More informationCoordinate Geometry. Topic 1. DISTANCE BETWEEN TWO POINTS. Point 2. The distance of the point P(.x, y)from the origin O(0,0) is given by
Topic 1. DISTANCE BETWEEN TWO POINTS Point 1.The distance between two points A(x,, y,) and B(x 2, y 2) is given by the formula Point 2. The distance of the point P(.x, y)from the origin O(0,0) is given
More informationChapter 1-2 Points, Lines, and Planes
Chapter 1-2 Points, Lines, and Planes Undefined Terms: A point has no size but is often represented by a dot and usually named by a capital letter.. A A line extends in two directions without ending. Lines
More informationVectors in Geometry. 1.5 The diagram below shows vector v 7, 4 drawn in standard position. Draw 3 vectors equivalent to vector v.
Vectors in Geometry 1. Draw the following segments using an arrow to indicate direction: a. from (3, 1) to (10, 3) b. from ( 5, 5) to (2, 9) c. from ( 4.2, 6.1) to (2.8, 2.1) d. What do they have in common?
More informationChapter 10 Similarity
Chapter 10 Similarity Def: The ratio of the number a to the number b is the number. A proportion is an equality between ratios. a, b, c, and d are called the first, second, third, and fourth terms. The
More information4. Given Quadrilateral HIJG ~ Quadrilateral MNOL, find x and y. x =
Name: DUE: HOUR: 2016 2017 Geometry Final Exam Review 1. Find x. Round to the nearest hundredth. x = 2. Find x. x = 3. Given STU ~ PQR, find x. x = 4. Given Quadrilateral HIJG ~ Quadrilateral MNOL, find
More informationMathematics For Class IX Lines and Angles
Mathematics For Class IX Lines and Angles (Q.1) In Fig, lines PQ and RS intersect each other at point O. If, find angle POR and angle ROQ (1 Marks) (Q.2) An exterior angle of a triangle is 110 and one
More informationGeometry: Semester 1 Midterm
Class: Date: Geometry: Semester 1 Midterm Multiple Choice Identify the choice that best completes the statement or answers the question. 1. The first two steps for constructing MNO that is congruent to
More informationMathematical derivations of inscribed & circumscribed radii for three externally touching circles (Geometry of Circles by HCR)
From the SelectedWorks of Harish Chandra Rajpoot H.C. Rajpoot Winter February 15, 2015 Mathematical derivations of inscribed & circumscribed radii for three externally touching circles Geometry of Circles
More informationName Honors Geometry Final Exam Review
2014-2015 Name Honors Geometry Final Eam Review Chapter 5 Use the picture at the right to answer the following questions. 1. AC= 2. m BFD = 3. m CAE = A 29 C B 71⁰ 19 D 16 F 65⁰ E 4. Find the equation
More informationTransactions in Euclidean Geometry
Transactions in Euclidean Geometry Volume 207F Issue # 6 Table of Contents Title Author Not All Kites are Parallelograms Steven Flesch Constructing a Kite Micah Otterbein Exterior Angles of Pentagons Kaelyn
More informationDownloaded from
Lines and Angles 1.If two supplementary angles are in the ratio 2:7, then the angles are (A) 40, 140 (B) 85, 95 (C) 40, 50 (D) 60, 120. 2.Supplementary angle of 103.5 is (A) 70.5 (B) 76.5 (C) 70 (D)
More informationDepartment of Mathematics
Department of Mathematics TIME: 3 Hours Setter: DAS DATE: 07 August 2017 GRADE 12 PRELIM EXAMINATION MATHEMATICS: PAPER II Total marks: 150 Moderator: GP Name of student: PLEASE READ THE FOLLOWING INSTRUCTIONS
More informationEducation Resources. This section is designed to provide examples which develop routine skills necessary for completion of this section.
Education Resources Straight Line Higher Mathematics Supplementary Resources Section A This section is designed to provide examples which develop routine skills necessary for completion of this section.
More informationGet Ready. Solving Equations 1. Solve each equation. a) 4x + 3 = 11 b) 8y 5 = 6y + 7
Get Ready BLM... Solving Equations. Solve each equation. a) 4x + = 8y 5 = 6y + 7 c) z+ = z+ 5 d) d = 5 5 4. Write each equation in the form y = mx + b. a) x y + = 0 5x + y 7 = 0 c) x + 6y 8 = 0 d) 5 0
More informationPreliminary: First you must understand the relationship between inscribed and circumscribed, for example:
10.7 Inscribed and Circumscribed Polygons Lesson Objective: After studying this section, you will be able to: Recognize inscribed and circumscribed polygons Apply the relationship between opposite angles
More informationGrade IX. Mathematics Geometry Notes. #GrowWithGreen
Grade IX Mathematics Geometry Notes #GrowWithGreen The distance of a point from the y - axis is called its x -coordinate, or abscissa, and the distance of the point from the x -axis is called its y-coordinate,
More information1. AREAS. Geometry 199. A. Rectangle = base altitude = bh. B. Parallelogram = base altitude = bh. C. Rhombus = 1 product of the diagonals = 1 dd
Geometry 199 1. AREAS A. Rectangle = base altitude = bh Area = 40 B. Parallelogram = base altitude = bh Area = 40 Notice that the altitude is different from the side. It is always shorter than the second
More information0815geo. Geometry CCSS Regents Exam In the diagram below, a square is graphed in the coordinate plane.
0815geo 1 A parallelogram must be a rectangle when its 1) diagonals are perpendicular ) diagonals are congruent ) opposite sides are parallel 4) opposite sides are congruent If A' B' C' is the image of
More informationVAISHALI EDUCATION POINT (QUALITY EDUCATION PROVIDER)
BY PROF. RAHUL MISHRA VAISHALI EDUCATION POINT (QUALITY EDUCATION PROVIDER) CONSTRUCTIONS Class :- X Subject :- Maths Total Time :- SET A Total Marks :- 240 QNo. General Instructions Questions 1 Divide
More informationLesson 2: Basic Concepts of Geometry
: Basic Concepts of Geometry Learning Target I can identify the difference between a figure notation and its measurements I can list collinear and non collinear points I can find the distance / length
More informationMATH-G Geometry SOL Test 2015 Exam not valid for Paper Pencil Test Sessions
MATH-G Geometry SOL Test 2015 Exam not valid for Paper Pencil Test Sessions [Exam ID:2LKRLG 1 Which Venn diagram accurately represents the information in the following statement? If a triangle is equilateral,
More informationfall08ge Geometry Regents Exam Test Sampler fall08 4 The diagram below shows the construction of the perpendicular bisector of AB.
fall08ge 1 Isosceles trapezoid ABCD has diagonals AC and BD. If AC = 5x + 13 and BD = 11x 5, what is the value of x? 1) 8 4 The diagram below shows the construction of the perpendicular bisector of AB.
More information10.2 Trapezoids, Rhombi, and Kites
10.2 Trapezoids, Rhombi, and Kites Learning Objectives Derive and use the area formulas for trapezoids, rhombi, and kites. Review Queue Find the area the shaded regions in the figures below. 2. ABCD is
More informationGEOMETRY PRACTICE TEST END OF COURSE version A (MIXED) 2. Which construction represents the center of a circle that is inscribed in a triangle?
GEOMETRY PRACTICE TEST END OF COURSE version A (MIXED) 1. The angles of a triangle are in the ratio 1:3:5. What is the measure, in degrees, of the largest angle? A. 20 B. 30 C. 60 D. 100 3. ABC and XYZ
More informationCIRCLE THEOREMS M.K. HOME TUITION. Mathematics Revision Guides Level: GCSE Higher Tier
Mathematics Revision Guides Circle Theorems Page 1 of 27 M.K. HOME TUITION Mathematics Revision Guides Level: GCSE Higher Tier CIRCLE THEOREMS Version: 3.5 Date: 13-11-2016 Mathematics Revision Guides
More informationCircles - Probability
Section 10-1: Circles and Circumference SOL: G.10 The student will investigate and solve practical problems involving circles, using properties of angles, arcs, chords, tangents, and secants. Problems
More informationGeometry 2 nd Semester Review Packet PART 1: Chapter 4
Geometry 2 nd Semester Review Packet PART 1: Chapter 4 Name 1. Determine if these are scale figures. If so state the scale factor, treating the larger image as the original figure, and the smaller as the
More information