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88 = πd
88 = 22/7 d
d = 88 x 7 ÷ 22
d = 28
r = 14 cm
luas = πr²
= 22/7 x 14 x 14
= 616 cm
K = 88 cm
π = 22/7
Dijawab :
K = 2πr
88 = 2 . 22/7
88 = 44/7 . r
r = 88 : 44/7
r = 88 x 7/44
r = 14 cm
Maka,
Luas = πr²
= 22/7 . 14 . 14
= 616 cm
Jadi, jawabannya adalah 616 cm².