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KitanaLaVaudaise
@KitanaLaVaudaise
January 2021
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Bonsoir, j'ai vraiment besoin d'aide car en absence de cours je ne comprends pas ce qu'il faut faire. Aidez moi j'ai fait n'importe quoi
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AhYan
ABCD est un rectangle :
AB = 5+√7
AD = 2√7
1) AC² = AB²+BC² or BC=AD
AC² = (5+√7)²+(2√7)²
AC² = 25+10√7+7+28
AC² = 60+10√7
AC = √(60+10√7)
2) P(ABCD) = 2L+2l
P(ABCD) = 2×(5+√7) + 2×2√7 = 10+2√7+4√7 =10+6√7
3) A(ABCD) = L×l
A(ABCD) = (5+√7)×(2√7)
A(ABCD) = 10√7+14
2 votes
Thanks 3
KitanaLaVaudaise
merci bcp tu me sauves !
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KitanaLaVaudaise
January 2021 | 0 Respostas
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AB = 5+√7
AD = 2√7
1) AC² = AB²+BC² or BC=AD
AC² = (5+√7)²+(2√7)²
AC² = 25+10√7+7+28
AC² = 60+10√7
AC = √(60+10√7)
2) P(ABCD) = 2L+2l
P(ABCD) = 2×(5+√7) + 2×2√7 = 10+2√7+4√7 =10+6√7
3) A(ABCD) = L×l
A(ABCD) = (5+√7)×(2√7)
A(ABCD) = 10√7+14