23-24 ya . pakai cara ya

23.
24 = √AB^2 - (12 + 6)^2
24^2 = (√AB^2 - 256)^2
576 = AB^2 - 256
AB^2 = 576 + 324
AB = √900
AB = 30 cm

24. 
PL = √ 25^2 - (12 - 5)^2
PL = √625 - 49
PL = √576
PL = 24 cm