Surface area of a cube with side length s = 6s².

A diagram illustrating the surface area of a cube with side length s, showing the cube unfolding into a net of six squares, each with area s², resulting in a total surface area of 6s².

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Let’s solve this step by step.

We are given a cube with side length s.

A cube has 6 faces, and each face is a square.

The area of one square face = side × side = s × s = s²

Since there are 6 identical faces, we multiply the area of one face by 6:

Total surface area = 6 × s² = 6s²

This matches what’s shown in the diagram — when you unfold the cube into a net, you see 6 squares, each labeled s².

So, no matter how big or small the cube is, as long as each side is length s, the total surface area will always be 6 times s squared.

Final Answer:
6s²

Parent Tip: Review the logic above to help your child master the concept of surface area of cube worksheet.

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