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= 2 x 22/7 x 14 cm
= 88 cm
Luas = πr²
= 22/7 x 14 cm x 14 cm
= 616 cm²
22/7 X 14 X 14 = 44 X 14 = 616 cm^^
Keliling = 2 X Phi X 14
= 2 X 22/7 X 14 = 88 cm