Tolong jawab no 15 cara nya

Luas = (PS + QR) x PQ / 2
138 x 2 = 23 x PQ
PQ = 12

SR² = (PS – QR)² + PQ²
SR² = (14 – 9)² + 12²
SR² = 5² + 144 = 25 + 144 = 169
SR = √169 = 13

#SMOGA MEMBANTU