bonjour
AB = u = 12 cm
Placer les points C, D, E, F tels que :
AC = 1/4 u = 1/4 x 12 = (3 x 4)/4 = 3 cm
AD = -1/3 u = -1/3 x 12 = -(3 x 4)/3 = -4 cm
AE = 5/6 u = 5/6 x 12 = (5 x 2 x 6)/6 = 10 cm
BF = -2/3 u = -2/3 x 12 = (-2 x 3 x 4)/3 = -8 cm
3) verifier que le point E est tel que BE = -1/6 u :
AE = 5/6 u
AB + BE = 5/6 u
BE = 5/6 u - AB
BE = 5/6 u - u
BE = 5/6 u - 6/6 u
BE = -1/6 u
