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Mumavanesa57
@Mumavanesa57
May 2019
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Svp aidé moi j'ai un dm je n'arrive pas a faire ma question est ....: un champ de 5980m2 a la forme d'un trapèze, on connait la hauteur (65m) et la grande base (153m). Calculé la mesure de la petite base.
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MonsieurFirdown
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L’aire d’un trapèze est donnée par la formule : A = (B×b) /2× la hauteur =
On connaît A=(5980) B=(153) et h=(65). Il faut déterminer b.
5980=(153+b ) /2 ×65
5980× 2 = (153 + b) ×65
5980×2/65=153+b
5980×2 /65 − 153= b
b = 31
La mesure de la petite base de ce trapèze est de 31
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L’aire d’un trapèze est donnée par la formule : A = (B×b) /2× la hauteur =On connaît A=(5980) B=(153) et h=(65). Il faut déterminer b.
5980=(153+b ) /2 ×65
5980× 2 = (153 + b) ×65
5980×2/65=153+b
5980×2 /65 − 153= b
b = 31
La mesure de la petite base de ce trapèze est de 31