# Project: Lesson Plan

Topic : Congruence

Learning Objective: Proving Triangles Congruent.

1. Students will be able to prove triangles are congruent using ASA, SAS, and SS.
2. Students will be able to prove triangles are congruent using definitions of midpoint and bisector.
3. Student will be able to write basic formal proofs of triangle congruence.

Common Core State Standard High School G-CO.8

Understand congruence in terms of rigid motions

1. Use geometric descriptions of rigid motions to transform figures and to predict the effect of a given rigid motion on a given figure; given two figures, use the definition of congruence in terms of rigid motions to decide if they are congruent.
2. Use the definition of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and corresponding pairs of angles are congruent.
3. Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions.