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125,6 = 2 . 3,14 . r
125,6 = 6,28 . r
125,6 : 6,28 = r
20 = r
L = π r²
= 3,14 . 20 . 20
= 314 . 4
= 1256 cm²
125,6 = 2 . 3,14 . r
125,6 = 6,28 . r
125,6 : 6,28 = r
20 = r
L = π r²
= 3,14 . 20 . 20
= 314 . 4
= 1256 cm²