∠СВА=180°-∠СВМ=40°
∠СВА+∠САВ+∠ВСА=180°
9х+13+14х+12+40=180
23х=125
х=5
∠ВСА=14×5+12=82°
∠САВ=180°-40°-82°=58°
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∠СВА=180°-∠СВМ=40°
∠СВА+∠САВ+∠ВСА=180°
9х+13+14х+12+40=180
23х=125
х=5
∠ВСА=14×5+12=82°
∠САВ=180°-40°-82°=58°