Прямая, параллельная стороне AC{"color":"#202335","fontFamily":"stix","language":"ru"} треугольника ABC{"color":"#202335","fontFamily":"stix","language":"ru"}, пересекает стороны AB{"color":"#202335","fontFamily":"stix","language":"ru"} и BC{"color":"#202335","fontFamily":"stix","language":"ru"} в точках M{"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 = 12{"color":"#202335","fontFamily":"stix","language":"ru"}, AC = 42{"color":"#202335","fontFamily":"stix","language":"ru"}, NC=25.{"color":"#202335","fontFamily":"stix","language":"ru"}
