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Clemduchene
@Clemduchene
May 2019
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Bonjour, j'aurais besoin d'aide pour mon DM de math merci d'avance.
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Verified answer
Bonjour,
applique pythagore
BC
² = AB²+AC²
(a+2)² = a²+5²
a²+4a+4 = a²+25
a²+4a-a² = 25-4
4a = 21
a = 21/4 = 5,25cm
BC² =(5,25+2)² = 52,5625
AB²+AC² = 5,25²+5² = 52,5625
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clemduchene
Merci! C'est en centimètre ou millimètre ?
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Verified answer
Bonjour,applique pythagore
BC² = AB²+AC²
(a+2)² = a²+5²
a²+4a+4 = a²+25
a²+4a-a² = 25-4
4a = 21
a = 21/4 = 5,25cm
BC² =(5,25+2)² = 52,5625
AB²+AC² = 5,25²+5² = 52,5625