Writing Two Column Proofs

Grade 1145 min

Learning Objective

I can construct a two-column proof to demonstrate the validity of geometric theorems.

Lesson Flow

Watch Video

10 min

Geometry Proofs Explained! Triangle Congruence

Mashup Math

Practice

14 min

12 questions β€’ Short answer

Exit Ticket

5 min

β€œGiven that angle A is congruent to angle D and segment AB is congruent to segment DE, construct a two-column proof to show that triangle ABC is congruent to triangle DEF. Include all statements and reasons. Given that segment PQ is congruent to segment RS and angle PQR is congruent to angle SRT, construct a two-column proof to demonstrate that triangle PQR is congruent to triangle SRT. Include all statements and reasons.”

Teacher Guide

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  • Answer keys for all questions
  • Differentiation strategies
  • Extension activities
  • Printable student handouts