AC = sqrt(56^2 + 33^2) = 65cm
EC = sqrt(65^2 - 16^2) = 63 cm
to find AD 33-25 = 8
8^2 + 56^2 = AD^2
64 + 3136=3200^2
square root (3200) = 56.5685 round off to 56.6cm
