Tolong bnget sih dikasih cara..ditunggu ya

QS = 9 cm
SR = 9 cm

a.
(QS)^2 = PS × SR
9^2 = PS × 9
81 = 9PS
PS = 81/9
PS = 9 cm

b.
(PQ)^2 = PS × PR
(PQ)^2 = 9 × (9 + 9)
(PQ)^2 = 9 × 18
(PQ)^2 = 162
PQ = V162
PQ = 12,7 cm

c.
PR = PS + SR
PR = 9 + 9
PR = 18 cm