## Day 145 - Do Now - Angles and triangles - 2014 - 05.06.docx - Section 1: Do Now

Day 145 - Do Now - Angles and triangles - 2014 - 05.06.docx

# Sum of the Angles in Triangles

Unit 9: Geometry
Lesson 1 of 8

## Big Idea: Students cut angles in a triangle and rearrange them to discover why the sum is 180 degrees

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75 minutes

### Yazmin Chavira MTP

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