Question

what is the full (expanded) form of cpctc?

○ corresponding parts of congruent triangles are congruent

○ corresponding parts of circle or triangles are congruent

○ corresponding parts of congruent tangents are congruent

○ corresponding parts of congruent triangles are common

Explanation:

CPCTC is a term in Geometry (a subfield of Mathematics) related to congruent triangles. The correct expansion is "Corresponding parts of congruent triangles are congruent" as it refers to the property that corresponding sides and angles of congruent triangles are congruent. The other options have incorrect terms (like circle, tangents, common) which do not match the definition of CPCTC.

Answer:

A. Corresponding parts of congruent triangles are congruent