Ploshad treugolnika ABC 90. Biaektrisa AD delit storonu BC BD:CD=2:3. Otrezok BL peresekaet AD bisektrisu v tochke E a storonu AC v tochke L tak chto AL:CL=1:2. Naiti ploshad chetirexugolnika EDCL - вопрос №2543569