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IM G Unit 1 Lesson 12 Cool Down

Priya tried to translate triangle ABC by the directed line segment from D to E She knows something went wrong because the image isn't congruent to the original figure.
Image

What is one idea that Priya probably understands about translations?

What is one idea that Priya doesn't understand about translations?

Translate triangle ABC b the directed line segment from D to E.
IM G Unit 1 Lesson 12 Cool Down from IM Geometry by Illustrative Mathematics, https://im.kendallhunt.com/HS/students/2/1/12/index.html. Licensed under the Creative Commons Attribution 4.0 license, https://creativecommons.org/licenses/by/4.0/