Предмет: Геометрия, автор: antWary

задача по геометрии
решите пожалуйста​

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Ответы

Автор ответа: mclp
0

Ответ:

12

Объяснение:

Пусть длина боковой стороны равна 7х. Тогда длина основания равна 4х. Периметр треугольника равен 7х+7х+4х=18х, что по условию равно 54. Составим и решим уравнение:

18х=54

х=3

Длина основания равна 4*3=12.

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