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.[br]
IM G Unit 1 Lesson 8 from IM Geometry by Illustrative Mathematics, [url=https://im.kendallhunt.com/HS/students/2/2/1/index.html]https://im.kendallhunt.com/HS/students/2/1/8/index.html[/url]. Licensed under the Creative Commons Attribution 4.0 license, [url=https://creativecommons.org/licenses/by/4.0/]https://creativecommons.org/licenses/by/4.0/[/url].
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Information: IM G 1.8 Cool Down