What is the cube surface area formula given in the material?

What is the cube surface area formula given in the material?

• A. SA = 6a²
• B. SA = 3a²
• C. SA = 6a
• D. SA = a⁶

Answer: (A)

Think of a cube: it has six faces, and each face is a square with area a^2, where a is the side length. Add up all six faces: 6 times a^2, giving SA = 6a^2. The other expressions don’t fit because they don’t reflect six square faces and the correct exponent for area.

Think of a cube: it has six faces, and each face is a square with area a^2, where a is the side length. Add up all six faces: 6 times a^2, giving SA = 6a^2. The other expressions don’t fit because they don’t reflect six square faces and the correct exponent for area.