Date Target Assignment Done! 2.1 Quiz 2.2 Quiz 2.3 Quiz Unit 2 Test
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1 Name Unit 2 Transformations Target 1: Identify and determine congruent parts given a rigid motion. Target 2: Perform and identify rigid transformations of points, segments, and figures. a. Perform and identify translations of points, segments, and figures. b. Perform and identify rotations of points, segments, and figures. c. Perform and identify reflections of points, segments, and figures. Target 3: Perform multiple transformations to determine coordinates and location of the image. Date Target Assignment Done! T Worksheet W Tessellations R 9-8 Quiz 2.1 Quiz F a 2.2a Worksheet M b 2.2b Worksheet T c 2.2c Worksheet W Quiz Review R 9-15 Quiz 2.2 Quiz F Day 1 Worksheet M Day 2 Worksheet T 9-20 Quiz 2.3 Quiz W 9-21 Rev Unit 2 Test Review R 9-22 Test Unit 2 Test YouTube Playlist:
2 Name 2.1 Transformations and Congruent Figures Target 1 Identify and determine congruent parts given a rigid motion Vocabulary Transformation: change of or of a figure. (location, size) Type of Transformations What s a rigid motion? Example 1: Using rigid motions Identify the type of transformation shown. What symbol is used to mean congruence? Example 2: Congruent Figures The figures below are congruent. Identify the following: All pairs of congruent angles, congruent pairs of sides, and the congruent statement.
3 1. The triangles below are congruent. How would you describe the figures? Circle all that apply. A) ABC XZY B) BAC YZX C) AB XY D) BCA XYZ E) I don t know. Write down your question below. 2. What type of rigid motion relates the two shoes? 3. Is this an example of a rigid motion? Explain below. VOCAB from the FUTURE Dilation a transformation that stretches or shrinks an image. Explanation:
4 2.2a Translations Target 2 Perform and identify rigid motions of points, segments, and figures Vocabulary the of a figure after a transformation. Pre image the position of a(n) prior to a transformation. Isometry a in which the pre image and its image are. (new position, original figure, transformation, congruent) Example 1: Translate a figure in the coordinate plane Graph and label the quadrilateral ABCD with vertices A( -2, 6), B( 2, 4), C(2,1), and D( -2, 3). Find the image of each vertex after the translation: (x, y) (x +3, y 3). Then graph the image using prime notation. Student Resources Game: sformations/translations-interactiveactivity.php Example 2: Write a translation rule and verify congruence Write a rule for the translation of ABC to A B C. Then verify that the transformation is an isometry. Graph and label image of the figure using the translation given a) 1 unit right & 2 units down. b) 4 units left & 3 units up
5 Graph and label image of the figure using the given translation rule c) (x, y) (x 2, y + 3) d) (x, y) (x + 4, y 4) Write the rule in proper notation to describe each translation Proper notation: (x, y) (x ±, y ± ) e) pre-image on the right f) pre-image on the left Rule: Rule: Find the coordinates of the vertices of each figure after the given translation. g) 3 units to the right and 6 unites down Z ( -4, -3), I(-2, -2), V(-2, -4) QUESTIONS OR REFLECTION Write down at most 2 questions that you can ask the next day. BE SPECIFIC.
6 2.3b Rotations Target 2 Perform and identify rigid motions of points, segments, and figures Vocabulary Rotation: a transformation that moves a figure along a path about a called the. Angle of rotation: can be both and. Angle of rotation is defined by two rays where one goes from the to a starting point on the figure and the other goes from the center of rotation to the corresponding final point on the figure. (circular, fixed point, center of rotation) (clockwise, counterclockwise, center of rotation) Example 1: Rotate the pre image 90 degrees about the origin Write the coordinates of the pre-image and the image below. Clockwise (CW) Counterclockwise (CCW) SCAN FOR EXTRA SUPPORT (Part two of the video) watch?v=7vkxhfpmyao Pre- Pre- Having difficulty? Write a question below to ask the next day. REMEMBER to ask! REFLECTION/ANALYSIS What do you notice about the corresponding coordinates of the preimage and the image? Write your predictions below
7 Example 2: Rotate the pre image 180 degrees about the origin. Write the coordinates of the pre-image and the image below. (CW)/(CCW) REFLECTION/ANALYSIS What do you notice about the corresponding coordinates of the pre-image and the image? Write your thoughts below. Having difficulty? Write a question below to ask the next day. REMEMBER to ask! Pre- Example 3: Rotate the pre image 270 degrees about the origin Write the coordinates of the pre-image and the image below. (CCW) REFLECTION/ANALYSIS What do you notice about the corresponding coordinates of the pre-image and the image? Write your thoughts below. Coordinates Pre-
8 2.3b Reflections Target 2 Perform and identify rigid motions and reflections of points, segments, and figures Vocabulary Line of Reflection: also called the, the axis that a figure is reflected about forming a congruent image that is symmetricical to the its original (axis of symmetry) Example 1: Reflect each image over the given line of reflection to find coordinates of the image. Write the coordinates of the pre-image and the image below. (Over the x-axis) (Over the y-axis) (Part two of the video) ch?v=5jatan_joxw Coordinates Pre- Coordinates Pre- REFLECTION/ANALYSIS What is the line called that helps you visually see how a figure is being reflected? What do you notice about the corresponding coordinates of the preimage and the image? Write your thoughts below.
9 Example 2: Reflect each image over the given line of reflection to find coordinates of the image. Write the coordinates of the pre-image and the image below (Over the line of x = 3) (Over the line of y = -2) Coordinates Pre- Coordinates Pre- REFLECTION/ANALYSIS What direction do x = any number equations go? What direction do y = any number equations go? What do you notice about the corresponding coordinates of the preimage and the image? Write your thoughts below.
10 2.3 - Compositions Target 3 Perform multiple transformations to determine coordinates and location of the image Vocabulary Glide Reflection: a transformation in the plane that is a combination of a and a through a line parallel to that line of reflection Composition of transformations: When two ore more transformations are combined to form a new transformation. Example 1: Find the image of a glide reflection The vertices of ABC are A(2, 1), B(5, 3), and C(6, 2). Find the coordinates image of ABC AFTER the glide relfection. FIRST: TRANSLATE: (x, y) (x 8, y) (line reflection, translation)) THEN REFLECT the translated figure in the x-axis A ( ) B ( ) C ( ) Coordinates of the GLIDE REFLECTION: Example 2: Describing the composition of transformations In the diagram, the coordinates of triangle ABC are given. Describe the composition of transformations from ABC to A B C to A B C. Write each rule for each transformation. Rule for ABC to A B C Rule for A B C to A B C
11 The vertices of ABC are A(-6, 2), B(4,-3), and C(4, 2). Find the coordinates image of ABC AFTER the glide relfection. Transformation 1: Reflect in the y axis Transformation 2: the translated figure in the x-axis A ( ) B ( ) C ( )
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