Предмет: Математика, автор: правка

сумма длин всех ребер прямоугольного параллелепипеда равна 28см.найти сумму длин трех ребер,выходящих из одной вершины.

Ответы

Автор ответа: rumba2104

Вершин - 8
Ребер - 12
В каждой его вершине соединяются 3 ребра
12:3=4
4 тройки, в каждой 1 вершина, 1 длина и 1 высота
28:4=7 (см)
Ответ: сумма длин трех ребер, выходящих из одной вершины, 7 см

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