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44 = 2 x 22/7 x r
44 = 44/7 x r
44 . 7 = 44r
44 . 7 / 44 = r
7 cm = r
r = K ÷ 2 ÷ π
= 44 ÷ 2 ÷ 22/7
= 22 ÷ 22/7
= 7 cm
terima kasih ^_^