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60 = 4 x sisi
= sisi
15 cm = sisi
luas persegi = Sisi x Sisi
L = 15 x 15
= 225 cm²
60 = 4 x s
s = 60 : 4
s = 15
Maka;
Luas = s x s
Luas = 15 x 15
Luas = 225 cm²