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stephanielogan
@stephanielogan
January 2021
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bjr, j'ai un dm de maths mais je n'y arrive pas trop,"" Déterminé les dimensions, au mm prés d'un rectangle dont le perimetre est de 14m et l'aire est 11m carré""
Merci de votre aide bonne journée
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trudelmichel
Verified answer
Aire=L xl
11=Lxl
l=l/11
P=2(L+l)
14=2(L+l)
7=L+l
7=L+L/11
7=L1/11+1)
7=L(12/11)
7/12/11=L
(7x11)/12=L
L=6.4
L+l=7
6.4+l=7
l= 0.6
L=6.4 et l=0.6
L+l=7 P=14
Lxl=6.4 x0.6= 14,4
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stephanielogan
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Verified answer
Aire=L xl11=Lxl
l=l/11
P=2(L+l)
14=2(L+l)
7=L+l
7=L+L/11
7=L1/11+1)
7=L(12/11)
7/12/11=L
(7x11)/12=L
L=6.4
L+l=7
6.4+l=7
l= 0.6
L=6.4 et l=0.6
L+l=7 P=14
Lxl=6.4 x0.6= 14,4