應幻星要求,題目用英文敘述,練數學同時也練英文^^
1.Let P be a point inside the triangle ABC such thatAB=BC, ∠ABC=80° ,∠PAC=40° and ∠ACP=30°. Find ∠BPC.
2.D and E are points on sides BC and AC of a triangle ABC such that AD and BE are angle bisectors of the triangle ABC. If DE bisects ∠ADC, find ∠A.