A cube is the simplest 3D solid: six identical squares meeting at right angles. Every dice, sugar cube and Rubik's cube starts here.
Volume
V = s³
s is the edge length
Surface area
A = 6 s²
By the numbers
- 6 faces (all squares)
- 12 edges (all the same length)
- 8 vertices (each is a corner of 3 faces)
- 4 lengths of internal diagonal — all equal to s√3
A cube is the 3D version of a square. A square is the 2D version of a line segment. The 4D version is called a tesseract — and yes, geometers happily talk about its 24 square faces.