Четырёхугольник ABCD{"color":"#202335","fontFamily":"stix","language":"ru"} описан около окружности, AB=11,{"color":"#202335","fontFamily":"stix","language":"ru"} BC=13,{"color":"#202335","fontFamily":"stix","language":"ru"} CD=21.{"color":"#202335","fontFamily":"stix","language":"ru"} Найдите AD.{"color":"#202335","fontFamily":"stix","language":"ru"}
