In this congruent triangles activity, 10th graders solve and complete 13 different problems. First, they use the illustrated congruent triangles to show other congruency in each problem. Then, students determine and prove the angle bisector in each problem.
Finding the Area of an Equilateral Triangle
Transformations in the Coordinate Plane
The Angle-Angle (AA) Criterion for Two Triangles to Be Similar
Congruence, Proof, and Constructions
The Definition of Sine, Cosine, and Tangent
New Review Geometry: Transformations, Congruence, and Similarity
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