1. For each transformation in the table below, indicate which properties are true by placing a check mark in every appropriate box.
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1 Transformations Unit Review 1. For each transformation in the table below, indicate which properties are true by placing a check mark in every appropriate box. The image and preimage are congruent The image and preimage are similar but not congruent Lengths of segments are preserved Measures of angles are preserved Translation Reflection Rotation Glide Reflection Dilation 2. Identify the rigid motion that maps the figure on the right onto the figure on the left. a. b. 3. R S T is a translation image of RST. What is a rule for the translation? Geometry Transformations ~1~ NJCTL.org
2 4. Find the coordinates of the vertices of each image. a. Rx-axis(ABCD) b. Ry-axis(ABCD) c. Ry=x(ABCD) d. Ry=2 (ABCD) e. Rx=-1(ABCD) f. r(270, O)(ABCD) g. r(180, O)(ABCD) h. r(90, O)(ABCD) i. D5(ABCD) j. T<2, -5> (ABCD) k. (Ry = -2 T<-4, 0>)(ABCD) Geometry Transformations ~2~ NJCTL.org
3 5. Draw the line of reflection you can use to map one figure onto the other. 6. Find the image of M(-1, 4) after two reflections, first across line l1, and then across line l2. a. l1 : x = 2, l2 : y-axis b. l1 : y = 2, l2 : x-axis 7. The letter H is reflected across the line x = -2 and then line x = 4. Describe the resulting transformation. Geometry Transformations ~3~ NJCTL.org
4 8. The letter J is reflected across line m and then line n. Describe the resulting transformation. 9. Point K is the center of regular quadrilateral ABCD. Find the image of the given point or segment for the given rotation. (counterclockwise) a. r(90, K)(K) b. r(270, K)(N) c. r(180, K)(ML) d. r(360, K)(JN) e. r(90, K)(JO) Geometry Transformations ~4~ NJCTL.org
5 10. Graph ABC and its glide reflection image. A(-5, 3), B(1, 2) and C(-2,-4) a. (RX-axis T<2, 1>)( ABC) 4.(Ry=2 T< 1, 0>)( ABC) 11. Write a congruence statement for the two figures in the coordinate grid. Then write a congruence transformation that maps one figure to the other. Geometry Transformations ~5~ NJCTL.org
6 12. Write a similarity statement for the two figures in the coordinate grid. Then write a similarity transformation that maps one figure to the other. 13. The solid-line figure is a dilation of the dashed-line figure with center of dilation P. Is the dilation an enlargement or a reduction? What is the scale factor of the dilation? 14. A dilation has center (0, 0). Find the image of each point for the given scale factor. a. P(-2, 4); D4(P) b. A(10, 4); D1/4(A) c. K(3, -6); D0.5(K) Geometry Transformations ~6~ NJCTL.org
7 15. Does the figure have reflectional symmetry? If so draw the line(s) of symmetry. Does the figure have rotational symmetry? If so state the degree of rotation. 16. Draw the image of the figure for the given rotation about P. Use prime notation to label the vertices of the image. r (100, P)( ABC) Geometry Transformations ~7~ NJCTL.org
8 ANSWER KEY Transformations Unit Review 1. For each transformation in the table below, indicate which properties are true by placing a check mark in every appropriate box. The image and preimage are congruent The image and preimage are similar but not congruent Lengths of segments are preserved Measures of angles are preserved Translation X X X Reflection X X X Rotation X X X Glide Reflection X X X Dilation X X 2. Identify the rigid motion that maps the figure on the right onto the figure on the left. a. b. Rotation Reflection 3. R S T is a translation image of RST. What is a rule for the translation? T<-7, 3>( RST) = R S T Geometry Transformations ~8~ NJCTL.org
9 4. Find the coordinates of the vertices of each image. a. Rx-axis(ABCD) b. Ry-axis(ABCD) A(-4, -3), B(1, -6), C(4, -5), D(0, -2) A(4, 3), B(-1, 6), C(-4, 5), D(0, 2) c. Ry=x(ABCD) d. Ry=2 (ABCD) A(3, -4), B(6,1), C(5, 4), D(2, 0) A(-4, 1), B(1, -2), C(4, -1), D(0, 2) e. Rx=-1(ABCD) f. r(270, O)(ABCD) A(2, 3), B(-3, 6), C(-6, 5), D(1, 2) A(-3, -4), B(-6, 1), C(-5, 4), D(-2, 0) g. r(180, O)(ABCD) h. r(90, O)(ABCD) A(4, -3), B(-1, -6), C(-4, -5), D(0, -2) A(3, 4), B(6, -1), C(5, -4), D(2, 0) i. D5(ABCD) j. T<2, -5> (ABCD) A(-20, 15), B(5, 30), C(20, 25), D(0, 10 A(-2, -2), B(2, 1), C(6, 0), D(2, -3) k. (Ry = -2 T<-4, 0>)(ABCD) A(-8, -7), B(-3, -10), C(0, -9), D(-4, -6) Geometry Transformations ~9~ NJCTL.org
10 5. Draw the line of reflection you can use to map one figure onto the other. 6. Find the image of M(-1, 4) after two reflections, first across line l1, and then across line l2. a. l1 : x = 2, l2 : y-axis b. l1 : y = 2, l2 : x-axis (-5, 4) (-1, 8) 7. The letter H is reflected across the line x = -2 and then line x = 4. Describe the resulting transformation. A translation 12 units to the right. Geometry Transformations ~10~ NJCTL.org
11 8. The letter J is reflected across line m and then line n. Describe the resulting transformation. 150 degree rotation clockwise 9. Point K is the center of regular quadrilateral ABCD. Find the image of the given point or segment for the given rotation. (counterclockwise) a. r(90, K)(A) D b. r(270, K)(D) A c. r(180, K)(DC) AB d. r(360, K)(KB) KB e. r(90, K)(BC) AB Geometry Transformations ~11~ NJCTL.org
12 10. Graph ABC and its glide reflection image. A(-5, 3), B(1, 2) and C(-2,-4) a. (RX-axis T<2, 1>)( ABC) 4.(Ry=2 T< 1, 0>)( ABC) 11. Write a congruence statement for the two figures in the coordinate grid. Then write a congruence transformation that maps one figure to the other. ABC FGH; Sample: Rx-axis T<3, -1>( ABC) = FGH 12. Write a similarity statement for the two figures in the coordinate grid. Then write a similarity transformation that maps one figure to the other. TUV ~ XYZ; Sample: T<-4, -3> D2( TUV) = XYZ Geometry Transformations ~12~ NJCTL.org
13 13. The solid-line figure is a dilation of the dashed-line figure with center of dilation P. Is the dilation an enlargement or a reduction? What is the scale factor of the dilation? enlargement; 7/4 14. A dilation has center (0, 0). Find the image of each point for the given scale factor. a. P(-2, 4); D4(P) b. A(10, 4); D1/4(A) c. K(3, -6); D0.5(K) (-8, 16) (5/2, 1) (1.5, -3) 15. Does the figure have reflectional symmetry? If so draw the line(s) of symmetry. Does the figure have rotational symmetry? If so state the degree of rotation. 180 degree rotational symmetry Geometry Transformations ~13~ NJCTL.org
14 16. Draw the image of the figure for the given rotation about P. Use prime notation to label the vertices of the image. r (100, P)( ABC) Geometry Transformations ~14~ NJCTL.org
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