How to find the surface area of a rectangular parallelepiped

This is called a rectangular parallelepiped, all six faces of which are rectangles. The formula for calculating its surface area is very simple: S = 2(ab + bc + ac), where a, b and c – the lengths of the edges.

Instruction

1. To begin calculate the area of three different faces of the parallelepiped. For example, the length of the box (a) is 7 cm, width (b) 6 cm, and the height (C) 4 cm Then the area of the upper (lower) faces will be equal to ab, i.e. 7x6=42 cm Area of one of the side faces will be equal to bc, i.e., 6x4=24, see Finally, the area of the front (rear) face is equal to ac, i.e. 7 × 4=28 cm.
2. Now let's add up all three scores and multiply the resulting sum by two. In our it will look like the following: 42+24+28=94; 94х2=188. Thus, the surface area of this cuboid is equal to 188 cm