4.2 Start Thinking. 4.2 Warm Up. 4.2 Cumulative Review Warm Up
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1 . Start Thinking La a ardstick at the base of a mirror. Stand at the end of the ardstick so ou are 3 feet from the mirror. Is our reflection the same distance from the mirror? Eplain wh or wh not. Hold up our right hand. Is our reflection holding up its right hand as well? Eplain wh or wh not.. Warm Up Reflect point P. State the coordinates of P'. 1. P( 5, 3 ); reflection in -ais. P(, 3 ); reflection in -ais 3. P( 1, 5 ); reflection in -ais. P( 1, 1 ); reflection in -ais 5. P (, ); reflection in -ais. P ( 5, 1 ); reflection in -ais. Cumulative Review Warm Up Classif the angle Copright Big Ideas Learning, LLC Geometr Resources b Chapter 115
2 Name Date. Practice A In Eercises 1 3, graph ABC 1. ( ) A 0,, B 1, 3, C, ; -ais. ( ) ( ) A,, B,, C 3, 5 ; -ais A, 1, B 3,, C 1, 1 ; = 3. and its image after a reflection in the given line. In Eercises and 5, graph the polgon and its image after a reflection in the given line.. = 5. = P Q R S P S R Q In Eercises and 7, graph JKL its image after the glide reflection. with vertices J(, 3 ), K(, 1 ), and L( 1, 5) and. Translation: (, ) ( 1, ) 7. Translation: (, ) ( +, 3) Reflection: in the -ais Reflection: in the line = In Eercises and 9, determine the number of lines of smmetr for the figure Find point W on the -ais so that VW XW X (, 1 ). + is a minimum given V (, 3) 11. A line = 3 5 is reflected in = a so that the image is given b = 1 3. What is the value of a? 1. Your friend claims that it is not possible to have a glide reflection if ou have two translations followed b one reflection. Is our friend correct? Eplain our reasoning. and 11 Geometr Copright Big Ideas Learning, LLC Resources b Chapter
3 Name Date. Practice B In Eercises 1 and, graph CDE and its image after a reflection in the given line. 1. C( 3, ), D(, 1 ), E( 0, 5 ); -ais. C 1,, D 1,, E 7, ; = In Eercises 3 and, graph the polgon and its image after a reflection in the given line. 3. -ais. = 1 L K N K N M L M In Eercises 5 and, graph ABC its image after the glide reflection. with vertices A( 1, ), B(, 1 ), and C(, 3) and 5. Translation: (, ) ( +, 1). Translation: (, ) ( 3, + 1) Reflection: in the line = Reflection: in the line = 7. Determine the number of lines of smmetr. Find point P on the -ais so that for the figure. AP + BP is a minimum. B A 9. Is it possible to perform two reflections of an object so that the final image is identical to the original image? If so, give an eample. If not, eplain our reasoning. 10. A triangle undergoes a glide reflection. Is it possible for the sides of the triangle to change length during this process? Eplain our reasoning. 11. Your friend claims that it is not possible to have a glide reflection if ou have one translation followed b two reflections. Is our friend correct? Eplain our reasoning. Copright Big Ideas Learning, LLC Geometr Resources b Chapter 117
4 Name Date. Enrichment and Etension Reflections 1. Reflect points F and G in the -ais. Name the coordinates and connect the points to form a polgon. Give the most specific name for the polgon.. Reflect points F and G in the -ais. Name the coordinates. F(a, c) G(a, b) 3. Reflect the points A and B in the line =. Connect the points to form a polgon. Give the most specific name for the polgon.. Reflect the points A and B in the line =. Connect the points to form a polgon. Give the most specific name for the polgon. A B are The vertices of ABC A,, B 0, 7, and C 1, 3. Reflect ABC in line 1 to obtain ABC. Then reflect ABC in line to obtain B C. Graph triangles ABC and B C. 5. Line 1: = ; Line : = 1. Line 1: = 3; Line : = 5 11 Geometr Copright Big Ideas Learning, LLC Resources b Chapter
5 Name Date. Puzzle Time What Tpe Of Dance Does A Geometr Teacher Like? Circle the letter of each correct answer in the boes below. The circled letters will spell out the answer to the riddle. Complete the sentence. 1. A is a transformation that uses a line like a mirror to reflect the figure.. If ( a, b) is reflected in the -ais, then its image is the point. 3. If (, ) a b is reflected in the line =, then its image is the point.. A reflection is a transformation involving a translation followed b a reflection. 5. A figure in the plane has line when the figure can be mapped onto itself b a reflection in a line. How man lines of smmetr does the figure have?. 7.. Identif the vertices of the image created after the reflection in the given line. 9. A( 3, ), B( 5, ); = 10. ( ) ( ) A, 3, B, ; -ais A, 1, B 3, 9 ; = 11. H S K L Q U W I A R E 9 ( b, a ) smmetr slider ( 3, 9) 1,, B 5 (, 3 ), (, ) B G I D F O A D N E C E ( 5, ) 3,, B ( b, a) ( a, b).5 reflection rotation ( 1, ), ( 9, 3) B 1 B (, 5), 3, glide Copright Big Ideas Learning, LLC Geometr Resources b Chapter 119
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