## 7 - 7 WU97 Prove exterior angles of a triangle using transversals.docx - Section 1: Warm Up

7 - 7 WU97 Prove exterior angles of a triangle using transversals.docx

# Prove exterior angles of triangle

Unit 7: PARALLEL LINES, TRANSVERSALS, AND TRIANGLES
Lesson 7 of 9

## Big Idea: Push kids to prove a harder fact about exterior angles, using transversals.

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3 teachers like this lesson
Standards:
Subject(s):
Math, Geometry, 8th grade, reasoning and proof, properties of triangles
75 minutes

### Jeff Li MTP

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