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Elsa76370
@Elsa76370
May 2019
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Bonjour je n'arrive pas a l'exercice 4 (image en dessous) du DM je suis en 3 ème je prend tout proposition de réponse merci a ceux qui répondront.
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rosiemuller2000
Verified answer
Coucou
5/DE = 4/BE = 3/7,5
DE = 5*7,5/3 = 12,5
2) a) 5² = 25
4² + 3² = 16 + 9 = 25
donc ABC rect en B
b) 12,5² = 7,5² + BE²
100 = BE²
10 = BE
voila j espere t avoir aider
2 votes
Thanks 2
elsa76370
Merci de ta réponse rosiemuller2000
rosiemuller2000
de rien ;)
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Lista de comentários
Verified answer
Coucou5/DE = 4/BE = 3/7,5
DE = 5*7,5/3 = 12,5
2) a) 5² = 25
4² + 3² = 16 + 9 = 25
donc ABC rect en B
b) 12,5² = 7,5² + BE²
100 = BE²
10 = BE
voila j espere t avoir aider