Réponse :
(BC)//(B'C')
thales
AB/AB'=AC/AC'=BC/B'C'
12/28 = AC/35=12/B'C'
AC = (35*3)/7=15cm
B'C' = (7*12)/3=28cm
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Réponse :
(BC)//(B'C')
thales
AB/AB'=AC/AC'=BC/B'C'
12/28 = AC/35=12/B'C'
AC = (35*3)/7=15cm
B'C' = (7*12)/3=28cm