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Abou080457
@Abou080457
May 2019
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Bonsoir ! pouvez vous m'aidez a mon exercice svp pour demain !
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isapaul
Verified answer
Bonsoir
AC = GF = 5
EF = DB = 3
On prend
AF = x alors FB = AB - AF = 17 - x
Aire ACGF = AC * AF = 5x
Aire EDBF = DB * FB = 3(17 - x) = 51 - 3x
1)
Pour avoir aires identiques il faut que
5x = 51 - 3x
8x = 51
x = 51/8 = 6.375
2)
Périmètre ACGF = 2( AC + CG) = 2( 5 + x) = 10 + 2x
Périmètre EFDB = 2( EF + FB ) = 2(3+ 17 - x) = 40 - 2x
Pour obtenir les périmètres identiques il faut que
10 + 2x = 40 - 2x
4x = 30
x = 30/4 = 7.5
Bonne soirée
2 votes
Thanks 1
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Verified answer
BonsoirAC = GF = 5
EF = DB = 3
On prend
AF = x alors FB = AB - AF = 17 - x
Aire ACGF = AC * AF = 5x
Aire EDBF = DB * FB = 3(17 - x) = 51 - 3x
1)
Pour avoir aires identiques il faut que
5x = 51 - 3x
8x = 51
x = 51/8 = 6.375
2)
Périmètre ACGF = 2( AC + CG) = 2( 5 + x) = 10 + 2x
Périmètre EFDB = 2( EF + FB ) = 2(3+ 17 - x) = 40 - 2x
Pour obtenir les périmètres identiques il faut que
10 + 2x = 40 - 2x
4x = 30
x = 30/4 = 7.5
Bonne soirée