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louipl
@louipl
June 2021
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On considère un disque D de rayon r.
1) Rappeler la formule qui permet de calculer:
a) son périmètre P; b) son aire A.
2) Le disque D a pour rayon 13 cm.
a) Calculer son périmètre arrondi au mm près.
b) Calculer son aire au mm carré près.
Réponse que j'ai trouver:
1) a) 2 x Pi x rayon
b) Pi x rayon x rayon ou Pi x rayon( au carré)
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June 2021 | 0 Respostas
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