Five-Minute Check CCSS Then/Now New Vocabulary Key Concept: Undefined Terms Example 1: Name Lines and Planes Example 2: Real-World Example: Model

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2 Five-Minute Check CCSS Then/Now New Vocabulary Key Concept: Undefined Terms Example 1: Name Lines and Planes Example 2: Real-World Example: Model Points, Lines, and Planes Example 3: Draw Geometric Figures Example 4: Interpret Drawings

3 What is the value of x 2 + 3yz if x = 3, y = 6, and z = 4? A. 27 B. 33 C. 72 D. 81

4 Solve 2(x 7) = 5x + 4. A. 6 B. C. 2 D. 6

5 Which is a solution of 3x + 4y = 14? A. ( 3, 4) B. ( 2, 5) C. (1, 3) D. (2, 3)

6 Factor 9x 2 25y 2. A. (3x 5y) 2 B. (3x + 5y) 2 C. (3x + 5y)(3x 5y) D. (9x + 5y)(x 5y)

7 Graph y = 3x + 2. A. B. C. D.

8 Which of the following equations is a quadratic equation? A. 4x = 2 B. 5x + 2y = 13 C. 6x 2 3x = 16 D. 5x 3 x = 0

9 Content Standards G.CO.1 Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc. Mathematical Practices 4 Model with mathematics. 6 Attend to precision.

10 You used basic geometric concepts and properties to solve problems. Identify and model points, lines, and planes. Identify intersecting lines and planes.

11 undefined term point line plane collinear coplanar intersection definition defined term space

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13 Name Lines and Planes A. Use the figure to name a line containing point K. Answer: The line can be named as line a. There are three points on the line. Any two of the points can be used to name the line.

14 Name Lines and Planes B. Use the figure to name a plane containing point L. Answer: The plane can be named as plane B. You can also use the letters of any three noncollinear points to name the plane. plane JKM plane KLM plane JLM

15 Name Lines and Planes The letters of each of these names can be reordered to create other acceptable names for this plane. For example, JKM can also be written as JMK, MKJ, KJM, KMJ, and MJK. There are 15 different three-letter names for this plane.

16 A. Use the figure to name a line containing the point X. A. line X B. line c C. line Z D.

17 B. Use the figure to name a plane containing point Z. A. plane XY B. plane c C. plane XQY D. plane P

18 Model Points, Lines, and Planes A. Name the geometric shape modeled by a patio. Answer: The patio models a plane.

19 Model Points, Lines, and Planes B. Name the geometric shape modeled by a button on a table. Answer: The button on the table models a point on a plane.

20 A. Name the geometric shape modeled by a colored dot on a map used to mark the location of a city. A. point B. line segment C. plane D. none of the above

21 B. Name the geometric shape modeled by the ceiling of your classroom. A. point B. line segment C. plane D. none of the above

22 Draw Geometric Figures Draw a surface to represent plane R and label it.

23 Draw Geometric Figures Draw a line anywhere on the plane.

24 Draw Geometric Figures Draw dots on the line for point A and B. Label the points.

25 Draw Geometric Figures

26 Draw Geometric Figures Draw dots on this line for point D and E. Label the points.

27 Draw Geometric Figures Label the intersection point of the two lines as P.

28 Answer: Draw Geometric Figures

29 Draw Geometric Figures Answer: There are an infinite number of points that are collinear with Q and R. In the graph, one such point is T(1, 0).

30 A. Choose the best diagram for the given relationship. Plane D contains line a, line m, and line t, with all three lines intersecting at point Z. Also, point F is on plane D and is not collinear with any of the three given lines. A. B. C. D.

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32 A. B. C. D.

33 Interpret Drawings A. How many planes appear in this figure? Answer: There are two planes: plane S and plane ABC.

34 Interpret Drawings B. Name three points that are collinear. Answer: Points A, B, and D are collinear.

35 Interpret Drawings C. Are points A, B, C, and D coplanar? Explain. Answer: Points A, B, C, and D all lie in plane ABC, so they are coplanar.

36 Interpret Drawings Answer: The two lines intersect at point A.

37 A. How many planes appear in this figure? A. one B. two C. three D. four

38 B. Name three points that are collinear. A. B, O, and X B. X, O, and N C. R, O, and B D. A, X, and Z

39 C. Are points X, O, and R coplanar? A. yes B. no C. cannot be determined

40 A. point X B. point N C. point R D. point A

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