Предмет: Геометрия, автор: valievaali

Найти углы треугольника ABC
Очень нужно решение!

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Автор ответа: ТаксяшкаЧ

Угол С=180°-140°=40°-т.к.смежные углы в сумме образуют 180°
Угол В=180°-70°=110°-т.к.смежные углы образуют в сумме 180°
Угол А=180°-(40°+110°)=30°-т.к.сумма углов треугольника равна 180°

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