PQ/AB=16/12=4/3QR/BC=20/15=4/3PR/AC=28/21=4/3PQ/AB=QR/BC=PR/AC => PQR подобен ABCS(PQR)/S(ABC)=(4/3)^2=16/9
PQ/ AB = QR/BC = PR/AC = 4/3
PQR : ABC = 4:3
PQ/AB=16/12=4/3
QR/BC=20/15=4/3
PR/AC=28/21=4/3
PQ/AB=QR/BC=PR/AC => PQR подобен ABC
S(PQR)/S(ABC)=(4/3)^2=16/9
PQ/ AB = QR/BC = PR/AC = 4/3
PQR : ABC = 4:3