Cpct is a property for triangles to prove their congruence.Suppose 2 triangles are of same measures. to prove them congruent we will need 3 measures. let these measures be the now sides are equal, which means triangles are congruent, right?no suppose we have to prove that one of the angles in the triangle is congruent to the other one in other triangle.this is where CPCT is used. CPCT literally means corresponding patrs of congruent triangles

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