A triangular prism is shown below. Work out the number of a) faces; b) edges; c) vertices.

A triangular prism has two triangular faces and three rectangular faces.

It therefore has 5 faces. Each triangular end has 3 edges, and there are 3 edges joining corresponding vertices, giving 9 edges in total. The two triangles have 3 vertices each, giving 6 vertices.

1. Faces: 5
2. Edges: 9
3. Vertices: 6

Answer: 5 faces, 9 edges and 6 vertices.