Salut !
Ex. 30 :
a) BE/BD = BG/BC = 4 / (4+2) = 4/6 = 2/3
b) FE/AD = 2/3 ⇒ 3/AD = 2/3 ⇒ AD = 3 ÷ 2/3 = 3 × 3/2 = 9/2 = 4,5 cm
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Salut !
Ex. 30 :
a) BE/BD = BG/BC = 4 / (4+2) = 4/6 = 2/3
b) FE/AD = 2/3 ⇒ 3/AD = 2/3 ⇒ AD = 3 ÷ 2/3 = 3 × 3/2 = 9/2 = 4,5 cm