Question

What property of equality is. PQ+QR=QR+RS, then PQ=RS​

Answer 1

Substitution

Explanation:

1. PQ = RS --------Given

2. PQ + QR = QR + RS ---------Addition Postulate

3. PQ + QR = PR;

QR + RS = QS -------Segment Addition

4. PR = QS ------- Substitution