Question

if (\triangle abccong\triangle pqr), then (overline{ac}congoverline{?})

Explanation:

Step1: Recall congruent triangle property

Corresponding sides of congruent triangles are equal.

Step2: Identify corresponding side

In $\triangle ABC \cong \triangle PQR$, vertex A ↔ P, C ↔ R, so $\overline{AC} \cong \overline{PR}$.

Answer:

PR