Question

помогите я тону пжпжпж​

Answer 1

Ответ:

∠AEB=180-80=100°

∠BDC=180-70=110°

∠ABE=BAE=(180-100)/2=40°

∠DBC=DCB=(180-110)/2=35°

∠EBD=180-80-70=30°

∠ABC=40+35+30=105°