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 A+ A− B

## What does CPCTC stand for?

Practice Proofs

Prove KJ $$\cong$$ JI

Prove ML $$\cong$$ 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.