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IM G 1.8 Cool Down

Tyler made a quadrilateral following these steps. He thinks it looks like a rectangle. When Andre grabbed point A and moved it, the quadrilateral no longer looks like a rectangle.

What shape did Tyler make? Explain how you know.

IM G Unit 1 Lesson 8 from IM Geometry by Illustrative Mathematics, https://im.kendallhunt.com/HS/students/2/1/8/index.html. Licensed under the Creative Commons Attribution 4.0 license, https://creativecommons.org/licenses/by/4.0/.