Mathematics ACT Aspire Test 2025 – 400 Free Practice Questions to Pass the Exam

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What is the formula for the surface area of a cube?

Surface Area = 6s

Surface Area = 2s^2

Surface Area = 6s^2

The correct formula for the surface area of a cube is derived from the properties of its faces. A cube has six faces, and each face is a square. The area of one square face can be calculated using the formula \(s^2\), where \(s\) represents the length of a side of the cube.

Since all six faces of the cube are identical, to find the total surface area, you simply multiply the area of one face by the number of faces. Thus, the total surface area is calculated as:

\[

\text{Surface Area} = 6 \times s^2

\]

This derivation shows that each face contributes equally to the total surface area, leading us to the formula \(6s^2\). This helps clarify why the correct answer is indeed \(C\). The other formulas do not account for the cube's six faces or use incorrect coefficients, which is why they do not represent the total surface area accurately.

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Surface Area = 4s^2

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