*Learning Goal: Develop understanding and fluency with triangle congruence proofs.*

# Classwork

- Estimation – 2 Rectangles
- Warm Up
- Notes
- Why does SAS work? (Illustrative Mathematics)
- Why does SSS work? (Illustrative Mathematics)
- Maybe put both of these on coordinate plane or in Geogebra to help?

# Standards:

**Common Core**- HSG.CO.B.8 – Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions.
- HSG.SRT.B.5 – Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

**TEKS**- G.6(B) – prove two triangles are congruent by applying the Side-Angle-Side, Angle-Side-Angle, Side-Side-Side, Angle-Angle-Side, and Hypotenuse-Leg congruence conditions

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