Question

12 if pq = 7 and pr = 28, what does qr measure? diagram of points p, q, r on a straight line with p---q----r

Explanation:

Step1: Identify segment addition

Since Q is between P and R, \( PR = PQ + QR \).

Step2: Solve for QR

Substitute \( PQ = 7 \) and \( PR = 28 \) into the equation: \( 28 = 7 + QR \). Subtract 7 from both sides: \( QR = 28 - 7 \).

Answer:

21