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Автор - saashka05

В треугольнике ABC угол равен 35 градусов , а угол B равен 39 градусов. Найдите пожалуйста внешний угол при вершине С

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Ответ

Автор - DramaSoul

Сумма углов треугольника = 180°

∠А + ∠В +∠С = 180°

∠С = 180° - (∠А +∠В) = 180° -( 35°+39° )= 106°

Внешний угол равен 180°-∠С = 180°-106° = 74°

Ответ: ∠C (внешний) = 74°

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