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Barriens
@Barriens
May 2019
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Bonsoir, besoin d'aide pour cet exercice niveau 4ème
MERCI à tous
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rosiemuller2000
Verified answer
Coucou
il suffit de calculer l'aire de toute la figure puis de retirer celle de la figure blanche
2 demis cercle = 1 cercle et on sais que la formule est pi * r² = pi*4 ≈ 12,566
1 parallélogramme= base * hauteur = 3,3 * 8 = 26,4 cm²
donc aire de toute la figure = 4pi + 26,4 ≈ 38,966 cm²
aire triangle = (b*h)/2 = (8*1,5)/2 = 6 cm²
donc aire figure grise ≈ 38,966 -6 ≈ 32,966 cm²
voila j espere t avoir aider si tu as des questions n hésite pas
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Verified answer
Coucouil suffit de calculer l'aire de toute la figure puis de retirer celle de la figure blanche
2 demis cercle = 1 cercle et on sais que la formule est pi * r² = pi*4 ≈ 12,566
1 parallélogramme= base * hauteur = 3,3 * 8 = 26,4 cm²
donc aire de toute la figure = 4pi + 26,4 ≈ 38,966 cm²
aire triangle = (b*h)/2 = (8*1,5)/2 = 6 cm²
donc aire figure grise ≈ 38,966 -6 ≈ 32,966 cm²
voila j espere t avoir aider si tu as des questions n hésite pas