Tolong jawab no yang dilingkari 20 dan 1 a

25.)AQ = 12cm
AC = 12cm + 16cm = 28cm
AP = x
PB = x + 5 cm
AB = 2x + 5
Ditanya : PB . . . ?

Jawab : AQ/AC = AP/AB
12/28 = x/2x + 5
24x + 60 = 28x
60 = 28x - 24x
60 = 4x
x = 60/4
x = 15cm

*panjang PB
PB = x + 5
= 15cm + 5cm = 20cm ( C )