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s = 15 cm
d2 = √15^ -12^ = 9 cm x 2 = 18 cm
L = d1 x d2 x 1/2 = 24 x 18 x 1/2 = 216 cm
s= 60/4
= 15 cm
⇒ 15² - x² = 12²
⇒225 - x² =144
⇒225-144= x²
⇒81 = x²
x= 9 cm ( d2= 18 )
luas: 1/2 x d1 x d2
= 1/2 x 24 x 18
= 216 cm²
(maaf kalau salah)