Решение:
C = A + B - 180° = 180° - 110° + 40° .
C = 180° - 150° = 30° .
C = 30° .
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Решение:
C = A + B - 180° = 180° - 110° + 40° .
C = 180° - 150° = 30° .
C = 30° .