Предмет: Геометрия, автор: angelinaostash

перша сторона трикутника у три раза менша за другу а третя сторона на 5 см менша за першу . Знайти сторони трикутника , якщо його периметр 75 см( срочно допоможіть )))

Ответы

Автор ответа: artemcuk1811

Ответ:

держи

Объяснение:

возьмём за Х первую сторону треугольника. тогда третья и вторая выразятся как х-5 и 3х

периметр равен 75 см

составим и решим уравнение:

х+х-5+3х=75

5х-5=75

5х=80

х=16

1 сторона равна 16 см

2 сторона равна 16-5=11 см

3 сторона=16*3=48 см

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