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CHARLOTTEGALLOU
@CHARLOTTEGALLOU
May 2019
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Salut vous pouvez m'aider
Piéce jointe ci-dessous
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calinizou
Verified answer
Bonsoir
pythgore
ab²+ae²=be²
3.5²+2.625²=be²
12.25+16.8090625= 19.140625
be= racine carré de 19.140625=4.375
puis thalès
cd/ae=ca/ba
1.5/2.625=ca/3.5
ca=3.5*1.5:2.625=2
en espérant ne pas me tromper
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CHARLOTTEGALLOU
D'accord
CHARLOTTEGALLOU
Merci
loulakar
Bonjour, on peut utiliser ces 2 théorèmes car on est dans un triangle rectangle pour le premier et car on a deux droites sécantes et 2 droites // pour le 2ieme
CHARLOTTEGALLOU
Merci
loulakar
Et pour le 2ieme c’est la réciproque du théorème de thales !
CHARLOTTEGALLOU
le résutat de calinizou est donc correcte ?
CHARLOTTEGALLOU
Merci beaucoup
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Verified answer
Bonsoirpythgore
ab²+ae²=be²
3.5²+2.625²=be²
12.25+16.8090625= 19.140625
be= racine carré de 19.140625=4.375
puis thalès
cd/ae=ca/ba
1.5/2.625=ca/3.5
ca=3.5*1.5:2.625=2
en espérant ne pas me tromper