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Julia2365
@Julia2365
January 2021
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Bonjour pouvez vous m'aidez à faire l'exercice 24 a) et b) svp merci d'avance :)
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taalbabachir
23) volume de la pyramide est : V = 1/3) x Sb x h
Sb = 7² = 49 cm² ⇒ V = 1/3) x 49 x 9 = 3 x 49 = 147 cm³ donc c'est la réponse R.2
24) a) V = 1/3) x Sb x h
Sb = 4.2 x 3.5 = 14.7 cm² ⇒ V = 1/3) x 14.7 x 6.3 = 30.87 cm³
b) Sb = 1/2 ) x 3² = 4.5 cm² ⇒ V = 1/3) x 4.5 x 4 = 6 cm³
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Sb = 7² = 49 cm² ⇒ V = 1/3) x 49 x 9 = 3 x 49 = 147 cm³ donc c'est la réponse R.2
24) a) V = 1/3) x Sb x h
Sb = 4.2 x 3.5 = 14.7 cm² ⇒ V = 1/3) x 14.7 x 6.3 = 30.87 cm³
b) Sb = 1/2 ) x 3² = 4.5 cm² ⇒ V = 1/3) x 4.5 x 4 = 6 cm³