В прямоугольном треугольнике ABC из вершины прямого угла C проведена высота CH . сколько пар подобных треугольников образовалось? Найдите BC, если CH=3,а АН=4.
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ответ: треугольник не существует.
Объяснение:
МК - серединный перпендикуляр к стороне АВ.
Все точки серединного перпендикуляра к отрезку равноудалены от концов отрезка, значит
АК = ВК.
Pbkc = BC + KC + ВК
50 = 11 + KC + ВК
KC + ВК = 50 - 11 = 39 см
Учитывая, что АК = ВК,
КС + АК = 39 см,
а так как АС = КС + АК, то
АС = 39 см
К сожалению, в условии ошибка, так как в треугольнике каждая сторона должна быть меньше суммы двух других сторон, а по данным задачи
39 > 11 + 11
значит треугольник с такими сторонами не существует.