Предмет: Геометрия, автор: FinestVlad

В равнобедренном ΔМКР с основанием КР проведена медиана МА. Периметр ΔМКР = 38 см, а периметр ΔАРМ = 30см. Найдите длину медианы МА.
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Ответы

Автор ответа: Zhiraffe

Медиана МА делит сторону КР пополам, значит МА делит периметр равнобедр.треугольника пополам, так что АР+РМ=38/2=19 см. Периметр АРМ=30=АР+РМ+МА=19 + МА => МА=30-19=11 см.

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