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B.luas persegi 600,25 cm2
81 = s²
s = 9
Kll = 4 x s
= 4 x 9 = 36 cm
B. kll = 4 x s
98 = 4 x s
s = 98 : 4
s = 24,5 cm
Luas = s²
= 24,5² = 60025 cm²