IM Geometry Unit 3 Lesson 9

How could you justify each statement?[br][br][math]\triangle P'Q'R'[/math][math]\cong[/math] [math]\triangle STU[/math][br][br][math]\triangle PQR[/math][math]\sim[/math][math]\triangle STU[/math]
How could you justify each statement?[br][br][math]\triangle G'H'I'\cong\triangle MNO[/math][br][br][math]\triangle GHI\sim\triangle MNO[/math]
Here are 2 triangles. One triangle has a 60 degree angle and a 40 degree angle. The other triangle has a 40 degree angle and an 80 degree angle.
[list=1][*]Explain how you know the triangles are similar.[/*][/list][list=1][*]How long are the sides labeled [i]x[/i] and [i]y[/i]?[/*][/list]
IM G Unit 3 Lesson from IM Geometry by Illustrative Mathematics, [url=https://im.kendallhunt.com/HS/students/2/3/1/index.html]https://im.kendallhunt.com/HS/students/2/3//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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