Предмет: Геометрия, автор: alexia010709

В треугольнике MNK MN=NK=10m, периметр MNK=27m, NL-высота треугольника. Найдите отрезок ML.

Пожалуйста помогите, очень срочно надо..

Ответы

Автор ответа: ildar502020
1

Ответ:   3,5 м.

Объяснение:

Треугольник MNK - равнобедренный.

По свойству равнобедренного  треугольника высота, опущенная на основание, одновременно является и биссектрисой, и медианой, и серединным перпендикуляром.

Следовательно, ML=KL.

P(ABC) =2MN+MK=27;

2*10+MK=27;

MK=27-20;

MK=7 м.

ML =MK/2 = 7/2 = 3.5 м.

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