Đề bài : Biết góc C bằng 18 độ,góc B bằng 54 độ,góc A bằng 108 độ. a) Tia phân giác ngoài tịa đỉnh C cắt AB tại E. Tính góc AEC. b) Tia phân giác ngoài tại đỉnh A cắt CE tại F.Tính AFC. GIÚP EM,GIÚP TỚ VỚI CÁC CAO NHÂN ƠI ! VẼ HÌNH +GIẢI THÍCH CÁC BƯỚC GIẢI RÕ RÀNG = 5 SAO+CTLHN.EM CẦN GẤP.CẢM ƠN CÁC BẠN VÀ CÁC ANH CHỊ NHÌU LẮM Ạ !!

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