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в прямоугольном треугольнике угол между медианой и биссектрисой, проведёнными из вершины прямого угла, равен 17 градусов. Найдите больший из двух острых углов треугольника.
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Угол C=90 градусов. CM - медиана, которая делит гипотенузу АВ поровну. Также по свойству медиан, медиана CM = MB = AM. CS-биссектриса. Угол SCA= Углу SCB=45 градусов. Угол MCB = 45-17=28 градусов, т.к. треугольник MCB равнобедренный, угол CBM=28 градусам => угол B=28 градусам, а угол А=62 градусом! Нам необходимо, найти наибольший , он им и является! Ответ:Угол А=62 градуса. Советую начертить рисунок чтобы разобраться, по моему рисунку, угол А сверху , угол B справа
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Автор:
julie84 - 6 лет назад
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