Triangle Congruence Proofs (Day 5)

Lesson Prep

Lesson Details

• Duration: 50 minutes

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

Prework

• Cut out class sets of cards for card sort activity

• Watch the embedded video above to see how to unpack the upcoming Concept Quiz

Answer Keys

• Link to Answer Keys

Classwork

• Estimation – Snickers

• Warm Up

• Unpack upcoming Concept Quiz

• Why ASA Works

• Card Matching

  • Handout

• Practice

Standards

Common Core

• 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