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jujumama1
@jujumama1
January 2021
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sphère & boules exercice 9
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mattéo123
Aire d'une sphère : 4 X pi X r²
= 4 X pi X (diamètre 18 donc rayon = 9)²
= 324pi
On sait que c'est une demi- sphère donc on divise l'aire par 2 et on trouve :
324pi / 2 = 162pi = env. 508,9 mètre cube ( arrondi au dm cube près )
1 votes
Thanks 1
mattéo123
D'accord
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Lista de comentários
= 4 X pi X (diamètre 18 donc rayon = 9)²
= 324pi
On sait que c'est une demi- sphère donc on divise l'aire par 2 et on trouve :
324pi / 2 = 162pi = env. 508,9 mètre cube ( arrondi au dm cube près )