Предмет: Математика, автор: nenvill

сколько различных треугольников можно составить из отрезков длины которых равны 1.5.9.13 и 17

Ответы

Автор ответа: Анатоле

Треугольник может существовать в том случае, если сумма 2 его сторон больше его третей стороны
5,9,13
9,13,17
5,13,17
3 треугольника

Автор ответа: xxxeol

Условие существования треугольника - сумма двух сторон больше третьей.
5 + 9 > 13
5 + 13 > 17
9 + 13 > 17
ОТВЕТ: Три треугольника.

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