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Sagot :

AYUDA

pythagore

AD² = AC² + DC² = 3,6² + 1,05² = 14,0625 => AD = 3,75

et

thalès

AD/AE = AC/AB

donc AD = AC/AB x AE

AE = AD x AB/AC

     = 3,75 x 12/3,6 = 12,5

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