Which statement about a cube is true?

Which statement about a cube is true?

• A. It has four sides.
• B. It has twelve edges.
• C. Its surface area is calculated as A = 6a^2.
• D. It has six faces.

Answer: (D)

A cube is defined by its surface being made up of flat square faces, and it has six of those faces. You can picture a cube by counting the exterior surfaces: front, back, left, right, top, and bottom. That six-face structure is the most direct, unambiguous feature that identifies a cube, regardless of its size. The other statements describe real properties too—the cube does have twelve edges and the surface area formula A = 6a^2 (where a is the edge length)—but the six-face count is the simplest, defining characteristic you can rely on. The idea of four sides would describe a square, which is a two-dimensional shape, not a cube.

A cube is defined by its surface being made up of flat square faces, and it has six of those faces. You can picture a cube by counting the exterior surfaces: front, back, left, right, top, and bottom. That six-face structure is the most direct, unambiguous feature that identifies a cube, regardless of its size. The other statements describe real properties too—the cube does have twelve edges and the surface area formula A = 6a^2 (where a is the edge length)—but the six-face count is the simplest, defining characteristic you can rely on. The idea of four sides would describe a square, which is a two-dimensional shape, not a cube.