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Missjuju05
@Missjuju05
April 2019
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J'ai rien compris c'est pour demain aider moi svp !!
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winner123
Verified answer
Bonjour
pour calculer le parcours, tu additionnes toutes les longueurs
Tu sais que ABC est rectangle en A
AB² = 500 ² - 400 ²
AB² = 90 000
AB = √90 000 =
300 m
BC =
500 m
Calcul de BE
CB/CD = CA/CE = BA/DE
400/1000 = 300/De
donc 400 De = 300000
DE =
750 m
CD² = 1000² + 750² = 1 562500
CD = √1562500 =
1 250 m
AB + BC + CD + DE
300 + 500 + 1 250 + 750 =
2 800 m
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winner123
compris ?
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S'il vous plait aider moi c'est pour demain URGENT !!!
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Lista de comentários
Verified answer
Bonjourpour calculer le parcours, tu additionnes toutes les longueurs
Tu sais que ABC est rectangle en A
AB² = 500 ² - 400 ²
AB² = 90 000
AB = √90 000 = 300 m
BC = 500 m
Calcul de BE
CB/CD = CA/CE = BA/DE
400/1000 = 300/De
donc 400 De = 300000
DE = 750 m
CD² = 1000² + 750² = 1 562500
CD = √1562500 = 1 250 m
AB + BC + CD + DE
300 + 500 + 1 250 + 750 = 2 800 m