This section will focus on using congruent triangles.

Video segment. Assistance may be required. Watch the following video. As you watch, take notes on what CPCTC means and how it is used.

Source: Using Corresponding Parts of Congruent Triangles are Congruent, MrPilarski, YouTube

If the all three sides and all three angles of two triangles are congruent, the triangles are congruent. The converse of this statement is also true.

Corresponding Parts of Congruent Triangles Are Congruent (CPCTC)
If two triangles are congruent, then their corresponding parts are congruent.

Try This Proof

Given: Lines l and h are parallel
FE ≅ FA

Show: DF ≅ BF

For this interactive activity, assistance may be required. Click on the reason for each step and move it next to the given step.

Follow this link for extra practice with proofs.