tolong bantu yang nomer 14 ya... makasiii

Segitiga PQR
QR² = PQ²+ PR²
= 16² + 12²
= 256 + 144 = √ 400 = 20 cm
PR²= RS × RQ
12² = RS× 20
144 = 20 RS
RS = 144/20
RS = 7,2 cm

QS= QR - RS= 20 - 7,2 = 12.8 cm

PS²= RS × QS = 7,2 × 12,8 = 92,16 cm
PS = √ 92,16 = 9,6cm

semoga jawabannya sesuai .))