Réponses

2013-05-31T19:11:45+02:00

volume = 2/3.pi.70^3 = 718377 mm³

Aire  = 2.pi.70³ = 30787 mm²

2013-05-31T19:36:59+02:00

Bonjour,

 

V 1/2 boule = ((4/3)pi*R^3)/2 = (2/3)*pi.70^3= 718379 mm^3 arrondi au mm^3

 

Aire de la 1/2 boule = 4pi*R²/2 = 2.pi.70² = 30788 mm² arrondi au mm²

 

J'espère que tu as compris

a+