Вопрос школьника по предмету Геометрия
реугольнике АВС угол A=15″, а угол В на 8° больше угла А. Найдите внешний угол при вершине С.
Ответ учителя по предмету Геометрия
Ответ:
Угол А=15°,В=15°+8°=23°.Сума всех углов треугольника равна 180°,отсюда угол С=180-(15+23)=180-38=142°.Внешний угол:180°-142°=38°
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