Прямая, параллельная стороне АС{"color":"#202335","fontFamily":"stix","language":"ru"} треугольника АВС{"color":"#202335","fontFamily":"stix","language":"ru"}, пересекает стороны АВ{"color":"#202335","fontFamily":"stix","language":"ru"} и ВС{"color":"#202335","fontFamily":"stix","language":"ru"} в точках М{"color":"#202335","fontFamily":"stix","language":"ru"} и N {"color":"#202335","fontFamily":"stix","language":"ru"}соответственно. Найдите BN,{"color":"#202335","fontFamily":"stix","language":"ru"} если MN=20, АС=28, NC=12.{"color":"#202335","fontFamily":"stix","language":"ru"}
