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Aigle91
@Aigle91
June 2021
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Salut je suis en galère avec un devoir , vous pouvez m'aidez s'il vous plait merci !
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isapaul
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Bonjour
Pour calculer il suffit de donner
DM = x alors MC = DC - DM = 30 - x
on obtient alors
Aire BCM = (12(30-x)) / 2
Aire ADM = 12x / 2 = 6x
L' énoncé demande que
Aire ADM = 1/3 * Aire BCM soit
3 * Aire ADM = Aire BCM
3 * (6x) = (12(30-x))/2
18x = (360 - 12x) / 2
2 * 18x = 360 - 12x
36x + 12x = 360
x = 360 / 48 = 7.5
Le segment DM = 7.5 cm
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BonjourPour calculer il suffit de donner
DM = x alors MC = DC - DM = 30 - x
on obtient alors
Aire BCM = (12(30-x)) / 2
Aire ADM = 12x / 2 = 6x
L' énoncé demande que
Aire ADM = 1/3 * Aire BCM soit
3 * Aire ADM = Aire BCM
3 * (6x) = (12(30-x))/2
18x = (360 - 12x) / 2
2 * 18x = 360 - 12x
36x + 12x = 360
x = 360 / 48 = 7.5
Le segment DM = 7.5 cm