Bonsoir,
aire de D1
3,14 * 4² = 3,14 *16 =>50,24cm²
le triple:
50,24 *3 = 150,72
150,72/3,14 = 48
√48 => 6,92 820 323cm
6 < 6,92 820 323 < 7
=> 6,9 cm de rayon (arrondi)
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Bonsoir,
aire de D1
3,14 * 4² = 3,14 *16 =>50,24cm²
le triple:
50,24 *3 = 150,72
150,72/3,14 = 48
√48 => 6,92 820 323cm
6 < 6,92 820 323 < 7
=> 6,9 cm de rayon (arrondi)