12, Lesson 14, Unit 2, Grade 8, EngageNY icon
Problem Set

Problem Set

Lesson 14. Unit 2. Grade 8 EngageNY

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This Problem Set is a part of the Lesson 14, Unit 2, Grade 8. Students know a third informal proof of the angle sum theorem. Students know how to find missing interior and exterior angle measures of triangles and present informal arguments to prove their answer is correct. Students see one final informal proof of the angle sum of a triangle before moving on to working with exterior angles of triangles.

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