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Sagot :

VINS

bonjour

j'en fais 1

AE/AD = AB/AC = EB/CD

AB²  =  3²+ 4² = 9 + 16 = 25

AB  = √25 = 5 cm

AB/AC  = BE/CD

5/AC = 3/7.5   ⇔ AC  = 12.5 cm

BC  = 12.5 - 5 =  7 .5 cm

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