Answer with explanation:
When we prove two triangles are congruent, either by following four congruent Axioms
1. S AS
2. SSS
3. A AS
4. A SA
Then C P CT C stands for Corresponding part of Congruent Triangles.
So, C P C TC is useful for proving , those corresponding parts of triangle that is side and Angles equal which are not used while proving Congruency of two triangles.