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Cerendu49
@Cerendu49
April 2019
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DM DE MATHS SUR LES MESURES MERCI D'AVANCE
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winner123
Verified answer
Bonjour
tu notes la longueur AM = x
périmètre de MBCR
2( 4.5 + 6 - x) = 9 + 12 - 2 x = - 2 x + 21
périmètre de AMPN
2( 2 + x) = 4 + 2 x
- 2 x + 21 = 4 + 2 x
- 2 x - 2 x = 4 - 21
- 4 x = - 17
x = 17/4
si x = 17/4 , les 2 périmètres sont égaux
MBCR = (2 x 4.5) + 2( 6 - 17/4)
= 9 + 2 ( 24/4 - 17/4)
= 9 + 2 x 7/4
= 9 + 14/4 = 36/4+ 14 /4 = 50/4 = 12.5 cm
AMPN = 4 + 2 x 17/4
= 4 + 34/4 = 16/4 + 34/4 = 50/4 = 12.5 cm
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Lista de comentários
Verified answer
Bonjourtu notes la longueur AM = x
périmètre de MBCR
2( 4.5 + 6 - x) = 9 + 12 - 2 x = - 2 x + 21
périmètre de AMPN
2( 2 + x) = 4 + 2 x
- 2 x + 21 = 4 + 2 x
- 2 x - 2 x = 4 - 21
- 4 x = - 17
x = 17/4
si x = 17/4 , les 2 périmètres sont égaux
MBCR = (2 x 4.5) + 2( 6 - 17/4)
= 9 + 2 ( 24/4 - 17/4)
= 9 + 2 x 7/4
= 9 + 14/4 = 36/4+ 14 /4 = 50/4 = 12.5 cm
AMPN = 4 + 2 x 17/4
= 4 + 34/4 = 16/4 + 34/4 = 50/4 = 12.5 cm