К окружности проведены касательная AC{"color":"#202335","fontFamily":"stix","language":"ru"} и секущая AB.{"color":"#202335","fontFamily":"stix","language":"ru"} Известны длины отрезков: AB=9,{"color":"#202335","fontFamily":"stix","language":"ru"} AD=4.{"color":"#202335","fontFamily":"stix","language":"ru"} Найдите AC.{"color":"#202335","fontFamily":"stix","language":"ru"}
