Lesson Plan: Congruence of Triangles: ASA and AAS | Nagwa Lesson Plan: Congruence of Triangles: ASA and AAS | Nagwa

Lesson Plan: Congruence of Triangles: ASA and AAS Mathematics • 8th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to prove that two triangles are congruent using either the angle-side-angle (ASA) or the angle-angle-side (AAS) criterion.

Objectives

Students will be able to

  • recognize whether two given triangles are congruent,
  • recognize that ASA and AAS are conditions of congruency but that SSA is not,
  • recognize whether ASA or AAS can be used to prove that two given triangles are congruent,
  • solve a word problem or a more complex geometric problem using ASA or AAS.

Prerequisites

Students should already be familiar with

  • common types of triangles and polygons,
  • the concepts of congruence and similarity,
  • reflections, rotations, and translations,
  • angle facts.

Exclusions

Students will not cover

  • SSS, SAS, or RHS,
  • applying trigonometric formulas.

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