tolong di jawab no.1&2

1. AB = CD, BC = AD, dan AC = AC
2. a) b) AB/PQ = BC/QR = CD/RS = AD/PS
c) AD/PS = CD/RS
AD/4,5 = 2/3
¤AD = 3
AB/PQ = CD/RS
AB/9 = 2/3
¤AB = 6
QR/BC = RS/CD
QR/5 = 3/2
¤QR = 7,5