tolong dibantu ya no.2 dan 3 pakai jalan nya thanks

no 2
16/12 = a/9
4/3 = a/9
4 x 9 = a x 3
36 = 3a
36/3 = a
12 cm = a

no 3
AB/PQ = BC/QR
15/10 = 9/QR
3/2 = 9/QR
3 x QR = 9 x 2
3QR = 18
QR = 18/3
QR = 6 cm

K PQRS = 2(p+l)
= 2(10+6)
= 2 x 16
= 32 cm

*semoga membantu. sukses selalu ^_^

semoga membantu.........