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Mathii10
@Mathii10
May 2019
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Bonjour,
J’ai un exercice de mathématiques mais je n’y arrive pas:
Un triangle rectangle à une hypoténuse mesurant 2 cm de plus que l’un des côtés de l’angle droit. L’autre côté mesure 5 cm.
Donner la mesure de l’hypoténuse.
Merci
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ProfdeMaths1
Verified answer
Soit a,b,c les 3 côtés du triangle rectangle
alors c=a+2 ; b=5
a²+b²=c²
(a+2)²=a²+5²
a²+4a+4=a²+25
4a+4=25
4a=21
a=21/4=
5,25
b=
5
et c=
7,25
0 votes
Thanks 1
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Verified answer
Soit a,b,c les 3 côtés du triangle rectanglealors c=a+2 ; b=5
a²+b²=c²
(a+2)²=a²+5²
a²+4a+4=a²+25
4a+4=25
4a=21
a=21/4=5,25
b=5 et c=7,25