BC = 21 см
Объяснение:
ABC~DFK => AB:BC:CA = DF:FK:KD => AB/BC = DF/FK => BC/AB = FK/DF =>
BC = (FK*AB)/DF = (7*15)/5 = 21
BC = 21 см
Объяснение:
ABC~DFK => AB:BC:CA = DF:FK:KD => AB/BC = DF/FK => BC/AB = FK/DF =>
BC = (FK*AB)/DF = (7*15)/5 = 21