## Reflection: Safety Group Assessment: Triangle Congruence and Proof - Section 1: Warm-Up

My goal in discussing #1 on the warm-up was to develop a shared understanding of exactly what is needed to write a sufficient proof.  I wanted students to better grasp why a proof would receive an A, B, C, D, or F and, more importantly, why.

Surfacing Students' Notions About the Features of Proof
Safety: Surfacing Students' Notions About the Features of Proof

# Group Assessment: Triangle Congruence and Proof

Unit 7: Discovering and Proving Triangle Properties
Lesson 8 of 10

## Big Idea: By analyzing other students' work, students will gain an understanding of the features of high-quality proofs while developing habits of mind.

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Standards:
Subject(s):
Math, Geometry, Triangles, reasoning and proof, Triangle Congruence, triangle similarity
80 minutes

### Jessica Uy

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