Bonsoir un petit exercice de maths! pouvez vous m'aider ??.... Pergunta de ideia deenglishamberforever

englishamberforever @englishamberforever

October 2020 1 108 Report

Bonsoir un petit exercice de maths! pouvez vous m'aider ??

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Skabetix

Bonjour,

D'après le théorème de Pythagore :

$ab {}^{2} = ac {}^{2} + cb {}^{2}$

$ab {}^{2} = 4.5 {}^{2} + 6 {}^{2}$

$ab {}^{2} = 20.25 + 36$

$ab {}^{2} = 56.25$

$ab = \sqrt{56.25}$

$ab = 7.5 \: cm$

Donc [AB] = 7,5 cm

Toujours d'après le théorème de Pythagore :

$fg {}^{2} = eg {}^{2} - ef {}^{2}$

$fg {}^{2} = 7 {}^{2} - 4 {}^{2}$

$fg {}^{2} = 49 - 16$

$fg {}^{2} = 33$

$fg = \sqrt{33} = 5.7 \: cm$

Donc [FG] = 5,7 cm arrondie au mm près

1 votes Thanks 1

englishamberforever merci bcp !!

Skabetix de rien :)

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