As an example, if 2 triangles are congruent by SSS, then we also know that the angles of 2 triangles are congruent.

Practice Proofs

ProveKJ $$ \cong $$ JI

ProveML $$ \cong $$ MN

The proof below uses CPCTC to prove that the diagonals of a rhombus bisect the shape's angles. This proof relies upon CPCTC.
All that is necessary for this proof is the following definition for a rhombus: a parallelogram with four congruent sides.

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