Properties of 3D Shapes

A face is a flat surface

An edge is a line where two faces meet

A vertex is a corner where edges meet

We can describe many 3D shapes by counting their faces, edges, and vertices

A cuboid has 6 rectangular faces.

Faces: 6

Edges: 12

Vertices: 8

A square-based pyramid has $1$ square face and $4$ triangular faces

The triangular faces meet at the apex

Faces: $5$

Edges: $8$

Vertices: $5$

A triangular prism has $2$ triangular faces and $3$ rectangular faces

Faces: $5$

Edges: $9$

Vertices: $6$

Some $3\text{D}$ shapes have curved surfaces

A sphere has $1$ curved surface, $0$ edges and $0$ vertices

A cylinder has $2$ flat circular faces and $1$ curved surface

A cylinder has $2$ circular edges and $0$ vertices