congruent triangles

Identical three-sided figures

Congruent triangles are triangles identical in shape and size—their corresponding sides have equal lengths and their corresponding angles have equal measures.

In geometry, proving triangles congruent allows you to establish that other parts must also match.

Several shortcuts exist for proving congruence without measuring everything: side-angle-side, angle-side-angle, and others.

If these two triangles are congruent, then this side must equal that one.

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same size · geometry · math class · geometric proof · proof · corresponding · identical · overlap · mirror · flip · rotation · SSS · SAS · ASA · parallel · theorems · shapes · vertices

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geometric equivalence

congruent trianglessimilar triangles

Shapes with equal corresponding angles

scalene triangles

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