bonjour
selon le th de Thalès
BD/BA = BE/BC = DE/AC
3/BA = 4.5/BC = 4 /6
4.5/BC = 4/6 ⇔ BC = 27 : 4= 6.75 cm
3 /BA = 4/6 ⇔ BA = 18 : 4 = 4.5 cm
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bonjour
selon le th de Thalès
BD/BA = BE/BC = DE/AC
3/BA = 4.5/BC = 4 /6
4.5/BC = 4/6 ⇔ BC = 27 : 4= 6.75 cm
3 /BA = 4/6 ⇔ BA = 18 : 4 = 4.5 cm