Короче.
MB/CB=BN/BA=MN/CA
6/BC=4/AB=5/10
5BC=4×10
5BC=60
5BC=60:5
BC=12
CN=BC-BN=12-4=8
5AB=40
AB=40:5
AB=8
Рад
Короче.
MB/CB=BN/BA=MN/CA
6/BC=4/AB=5/10
5BC=4×10
5BC=60
5BC=60:5
BC=12
CN=BC-BN=12-4=8
5AB=40
AB=40:5
AB=8
Рад