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= 16 * 4
= 64 cm persegi
Jadi sisi persegi = akar dari 64= 8 cm
K persegi= 8 * 4
= 32 cm
L s Panajng = L persegi
L persegi = s X s
64=s²
s=√64
s=8
keliling persegi = 4 X s = 4 x 8 = 32 cm