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ZingPath: Triangle Congruency and Similarity

Congruent Triangles

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Triangle Congruency and Similarity

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Congruent Triangles


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You will learn about similarity and congruence and how they relate to proportion.

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Now You Know

After completing this tutorial, you will be able to complete the following:

  • Define congruency for triangles.
  • Know the side-angle-side, angle-side-angle, and side-side-side congruency theorems.

Everything You'll Have Covered

What are congruent triangles?

~ Triangles with congruent corresponding sides and angles are congruent triangles.

The Animation includes three tests for triangle congruency. What are the statements of these tests?

~ 1. In any two triangles, if the consecutive sides are the same length and the measurements of the angles between them are the same, then the triangles are congruent. This is called side-angle-side congruency.

2. In any two triangles, if the measurements of two corresponding angles and the lengths of the common sides are equal, then the triangles are congruent. This called angle-side-angle congruency.

3. In any two triangles, if the lengths of the three corresponding sides are equal, then the triangles are congruent. This is called side-side-side congruency.

Tutorial Details

Approximate Time 2 Minutes
Pre-requisite Concepts Students should be familiar with the following terms: angle side angle congruency, congruent triangles, and side angle side congruency.
Course Geometry
Type of Tutorial Animation
Key Vocabulary ASA congruency, angle-side-angle congruency, congruent angles