reflexive property of congruence
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You can prove that to triangles are congruent with SSS, then use CPCTC to prove that two corresponding angles of those triangles are congruent.
You can only use CPCTC after you prove the 2 triangles congruent.
prove that QR = QR by the reflexive property.
1. There are two right triangles. 2. They have congruent hypotenuses. 3. They have one pair of congruent legs.
AB and BC are both radii of B. To prove that AB and AC are congruent: "AC and AB are both radii of B." Apex.