4, Lesson 11, Unit 3, Grade 8, EngageNY icon
Instructional Activity

Example 3

Lesson 11. Unit 3. Grade 8 EngageNY

EngageNY4 min(s)

This Instructional Activity is a part of the Lesson 11, Unit 3, Grade 8. Students present informal arguments as to whether or not two triangles are similar. Students practice finding lengths of corresponding sides of similar triangles. Students use what they know about dilation, congruence, the fundamental theorem of similarity (FTS), and the angle-angle (AA) criterion to determine if two triangles are similar.

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