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sou78
@sou78
January 2021
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Aidez moi à résoudre l'exercice 67
Merci
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winner123
Verified answer
Bonsoir
.1. figure 1
il y a 10 fois une longueur de 2 + 14 largeurs de a
P = 20 + 14 a
figure 2
15 longueurs de 2 + 12 largeurs a
P = 30 + 12 a
pour a = 1
P1 = 30 +14 = 44
P2 = 30 + 12 = 42
pour a = 2
P1 = 20 + 28 = 48
P2 = 30 + 24 = 54
pour a = 3
P1 = 20 + 42 = 62
P2 = 30 + 36 = 66
c) 20 + 14 a = 30 + 12 a
14 a - 12 a = 30 - 20
2 a = 10
a = 5
pour a = 5 , les 2 périmètres sont égaux
Aire 1 = 20 a
aire 2 = 20 a
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Verified answer
Bonsoir.1. figure 1
il y a 10 fois une longueur de 2 + 14 largeurs de a
P = 20 + 14 a
figure 2
15 longueurs de 2 + 12 largeurs a
P = 30 + 12 a
pour a = 1
P1 = 30 +14 = 44
P2 = 30 + 12 = 42
pour a = 2
P1 = 20 + 28 = 48
P2 = 30 + 24 = 54
pour a = 3
P1 = 20 + 42 = 62
P2 = 30 + 36 = 66
c) 20 + 14 a = 30 + 12 a
14 a - 12 a = 30 - 20
2 a = 10
a = 5
pour a = 5 , les 2 périmètres sont égaux
Aire 1 = 20 a
aire 2 = 20 a