M≅∠B, M T ‾ ≅ B G ‾ MT ≅ BG , ∠ T ≅ ∠ C ∠T≅∠C, M A ‾ ≅ B C ‾ MA ≅ BC , ∠ A ≅ ∠ G ∠A≅∠G, M T ‾ ≅ B G ‾ MT ≅ BG 1 Draw △ M T A △MTA and △ B G C △BGC on a coordinate plane.