The surface area of a cube with a side length of 9cm is 486cm2.
To calculate the surface area of a cube, you need to know the length of one of its sides. A cube consists of six identical faces, each shaped as a square. The area of a single square face can be determined by squaring the side length. In this case, with a side length of 9cm, the area of one face is calculated as:
9cm×9cm=81cm2.Since a cube has six of these square faces, the total surface area is obtained by multiplying the area of one face by 6:
Surface Area=6×81cm2=486cm2.This method is applicable to any cube, regardless of its side length. Remember the formula for surface area:
Surface Area=6×(side length)2.For a side length of 9cm, substituting into the formula yields:
6×92=6×81=486cm2.This straightforward calculation is fundamental for understanding how to work with three-dimensional shapes in geometry.
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