tolong jwb serta jalan

SR/PR = ST/PQ
7/(7 + 14) = 8/(PU + QU)
7/(7 + 14) = 8/(8 + QU)
7/21 = 8/(8 + QU)
1/3 = 8/(8 + QU)
8 + QU = 8 x 3
8 + QU = 24
QU = 24 - 8
QU = 16 cm (D)

RS/RP = ST/PQ
7/(7+14) = 8/PQ
7/21 =8/PQ
7 x PQ = 8 x 21
PQ = 168/7
PQ = 24

PQ = PU + UQ
24 = 8 + UQ
UQ = 24 - 8
UQ = 16 cm