In a rectangular prism:
- A face is any of the flat surfaces that make up the boundaries of the prism. There are typically 6 faces on a rectangular prism.
- An edge is where two faces meet; it is the line segment that connects two vertices. A rectangular prism has 12 edges.
- A vertex (plural: vertices) is a corner point where edges meet. A rectangular prism has 8 vertices.
Here's the identification:
- Face: 1
- Edge: 2
- Vertex: 3
So, for the respective terms:
- Face = 1
- Edge = 2
- Vertex = 3