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Voir Exercice ci dessous:

URGENTVoir Exercice Ci Dessous class=

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SOPHIE25
A. AB/AC = AD/AE = BD/CE
10/9/56/9 = 3/AE = BD/ 28/5
10/9/56/9 = BD/ 28/5
BD = 10/9 x 28/5 / 56/9
BD = 1 cm

AB/AC = AD/AE = BD/CE
10/9/56/9 = 3/AE = BD/ 28/5
10/9/56/9 = 3/AE
AE = 3 x 56/9 / 10/9
AE = 16,8 cm

DE = AE - AD
DE = 16,8 - 3
DE = 13,8 cm