Find the area of all the faces of a cube whose edge length is 5 dm.
| February 8, 2021 | education
The task:
a – 5 dm,
S -? dm².
The solution of the problem:
A cube is a regular polyhedron in which all faces are squares.
The total number of faces is 6.
Cube surface area: S = 6a²
S = 6 * 5² = 6 * 25 = 150 (dm²) – the area of all sides of the cube.
Answer: 150 dm² is the area of all sides of the cube.
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