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K = Π × d = 22/7 × 14 = 44 cm
L = Π × r² = 22/7 × 7 × 7= 154 cm²
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B
K = Π × d = 3,14 × 40 = 125,6 cm
L = Π × r² = 3,14 × 20 × 20 = 1256 cm²