How many edges does a cube have?

A cube has 12 edges, which is a fundamental characteristic of its geometric structure. Each of the 6 faces of the cube is a square, and each face contributes 4 edges. However, since each edge is shared between two faces, the total number of distinct edges can be calculated by considering that each edge belongs to two faces.

To understand this better, you can visualize the cube or build one with blocks. Each vertex of a cube connects three edges, and with 8 vertices in a cube, each edge makes a connection between two vertices. This arrangement leads to a total of 12 edges without counting any edge more than once.

Thus, the correct answer, which corresponds to the total unique edges found in a cube, is 12.