\nReflect \u25b3ABC and Figure D across line L. Label the reflected images.
\n
![\"Eureka](\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/03\/Eureka-Math-Grade-8-Module-2-Lesson-4-Exercise-Answer-Key-1.png\")
\nAnswer:
\n
![\"Eureka](\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/03\/Eureka-Math-Grade-8-Module-2-Lesson-4-Exercise-Answer-Key-2.png\")
<\/p>\nExercise 1.
\nReflect \u25b3ABC and Figure D across line L. Label the reflected images.
\n
\nAnswer:
\n<\/p>\n
Exercise 2.
\nWhich figure(s) were not moved to a new location on the plane under this transformation?
\nAnswer:
\nPoint B and line L were not moved to a new location on the plane under this reflection.<\/p>\n
Exercises 3\u20135<\/p>\n
Exercise 3.
\nReflect the images across line L. Label the reflected images.
\n![\"Eureka](\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/03\/Eureka-Math-Grade-8-Module-2-Lesson-4-Exercise-Answer-Key-3.png\")
\nAnswer:
\n![\"Eureka](\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/03\/Eureka-Math-Grade-8-Module-2-Lesson-4-Exercise-Answer-Key-4.png\")
<\/p>\n
Exercise 4.
\nAnswer the questions about the image above.
\na. Use a protractor to measure the reflected \u2220ABC. What do you notice?
\nAnswer:
\nThe measure of the reflected image of \u2220ABC is 66\u00b0.<\/p>\n
b. Use a ruler to measure the length of IJ and the length of the image of IJ after the reflection. What do you notice?
\nAnswer:
\nThe length of the reflected segment is the same as the original segment, 5 units.
\nNote: This is not something students are expected to know, but it is a preview for what is to come later in this lesson.<\/p>\n
Exercise 5.
\nReflect Figure R and \u25b3EFG across line L. Label the reflected images.
\n![\"Eureka](\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/03\/Eureka-Math-Grade-8-Module-2-Lesson-4-Exercise-Answer-Key-5.png\")
\nAnswer:
\n![\"Eureka](\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/03\/Eureka-Math-Grade-8-Module-2-Lesson-4-Exercise-Answer-Key-6.png\")
<\/p>\n
Exercises 6\u20139<\/p>\n
Use the picture below for Exercises 6\u20139.
\n![\"Eureka](\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/03\/Eureka-Math-Grade-8-Module-2-Lesson-4-Exercise-Answer-Key-7.png\")
<\/p>\n
Exercise 6.
\nUse the picture to label the unnamed points.
\nAnswer:
\nPoints are labeled in red above.<\/p>\n
Exercise 7.
\nWhat is the measure of \u2220JKI? \u2220KIJ? \u2220ABC? How do you know?
\nAnswer:
\nm\u2220JKI=31\u00b0, m\u2220KIJ=28\u00b0, and m\u2220ABC=150\u00b0. Reflections preserve angle measures.<\/p>\n
Exercise 8.
\nWhat is the length of segment Reflection(FH)? IJ? How do you know?
\nAnswer:
\n|Reflection(FH)|=4 units, and IJ=7 units. Reflections preserve lengths of segments.<\/p>\n
Exercise 9.
\nWhat is the location of Reflection(D)? Explain.
\nAnswer:
\nPoint D and its image are in the same location on the plane. Point D was not moved to another part of the plane because it is on the line of reflection. The image of any point on the line of reflection will remain in the same location as the original point.<\/p>\n
Question 1. Question 2. Question 3. Question 4. Question 1. Question 2. Question 3. Question 4. Question 5. Question 6. Question 7. Engage NY Eureka Math 8th Grade Module 2 Lesson 4 Answer Key Eureka Math Grade 8 Module 2 Lesson 4 Exercise Answer Key Exercise 1. Reflect \u25b3ABC and Figure D across line L. Label the reflected images. Answer: Exercise 2. Which figure(s) were not moved to a new location on the plane under this transformation? … Read more<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[1],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/81700"}],"collection":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/comments?post=81700"}],"version-history":[{"count":1,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/81700\/revisions"}],"predecessor-version":[{"id":91807,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/81700\/revisions\/91807"}],"wp:attachment":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/media?parent=81700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/categories?post=81700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/tags?post=81700"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nLet there be a reflection across line LAB<\/sub>. Reflect \u25b3CDE across line LAB<\/sub>. Label the reflected image.
\n![\"Eureka](\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/03\/Eureka-Math-Grade-8-Module-2-Lesson-4-Exit-Ticket-Answer-Key-20.png\")
\nAnswer:
\n![\"Eureka](\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/03\/Eureka-Math-Grade-8-Module-2-Lesson-4-Exit-Ticket-Answer-Key-20.1.png\")
<\/p>\n
\nUse the diagram above to state the measure of Reflection(\u2220CDE). Explain.
\nAnswer:
\nThe measure of Reflection(\u2220CDE) is 90\u00b0 because reflections preserve degrees of measures of angles.<\/p>\n
\nUse the diagram above to state the length of segment Reflection(CE). Explain.
\nAnswer:
\nThe length of Reflection(CE) is 10 cm because reflections preserve segment lengths.<\/p>\n
\nConnect point C to its image in the diagram above. What is the relationship between line LAB<\/sub> and the segment that connects point C to its image?
\nAnswer:
\nThe line of reflection bisects the segment that connects C to its image.<\/p>\nEureka Math Grade 8 Module 2 Lesson 4 Problem Set Answer Key<\/h3>\n
\nIn the picture below, \u2220DEF=56\u00b0, \u2220ACB=114\u00b0, AB=12.6 units, JK=5.32 units, point E is on line L, and point I is off of line L. Let there be a reflection across line L. Reflect and label each of the figures, and answer the questions that follow.
\n![\"Eureka](\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/03\/Eureka-Math-Grade-8-Module-2-Lesson-4-Problem-Set-Answer-Key-25.png\")
\nAnswer:
\n![\"Eureka](\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/03\/Eureka-Math-Grade-8-Module-2-Lesson-4-Problem-Set-Answer-Key-26.png\")
<\/p>\n
\nWhat is the measure of Reflection(\u2220DEF)? Explain.
\nAnswer:
\nThe measure of Reflection(\u2220DEF) is 56\u00b0. Reflections preserve degrees of angles.<\/p>\n
\nWhat is the length of Reflection(JK)? Explain.
\nAnswer:
\nThe length of Reflection(JK) is 5.32 units. Reflections preserve lengths of segments.<\/p>\n
\nWhat is the measure of Reflection(\u2220ACB)?
\nAnswer:
\nThe measure of Reflection(\u2220ACB) is 114\u00b0.<\/p>\n
\nWhat is the length of Reflection(AB)?
\nAnswer:
\nThe length of Reflection(AB) is 12.6 units.<\/p>\n
\nTwo figures in the picture were not moved under the reflection. Name the two figures, and explain why they were not moved.
\nAnswer:
\nPoint E and line L were not moved. All of the points that make up the line of reflection remain in the same location when reflected. Since point E is on the line of reflection, it is not moved.<\/p>\n
\nConnect points I and I’. Name the point of intersection of the segment with the line of reflection point Q. What do you know about the lengths of segments IQ and QI’?
\nAnswer:
\nSegments IQ and QI’ are equal in length. The segment II’ connects point I to its image, I’. The line of reflection will go through the midpoint, or bisect, the segment created when you connect a point to its image.<\/p>\n","protected":false},"excerpt":{"rendered":"