Find the sum of the lengths of all the edges of a rectangular parallelepiped, the dimensions of which are 13cm, 16cm, 21cm.
| June 2, 2021 | education
1) Parallelepiped – this is called a prism, the base of which is a parallelogram. All faces of a parallelepiped are parallelograms. A parallelepiped, the four side faces of which are rectangles, is called straight. A straight parallelepiped with all six faces of a rectangle is called rectangular.
2) A rectangular parallelepiped has 12 edges. Moreover, among them there are equal and there are 4 of them.
3) Thus, (13 + 16 + 21) * 4 = 50 * 4 = 200 cm is the sum of the lengths of all the edges of the parallelepiped.
Answer: 200 cm.
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