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r = diameter : 2
= 1/2 x 4 x 3,14 x (58 : 2)
= 6,28 x (58 : 2)
= 6,28 x 29
= 182,12 cm²
# Semoga Membantu
1/2 . 4 . 3,14 . 29 .29
182,12cm^2