- 3d Figures and Volumes
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- Classifying Solids
- Vertices, Edges, and Faces of a Solid
- Volume of a Rectangular Prism
- Volume of a Rectangular Prism made of Unit Cubes
- Volume of a Solid made of Cubes with Unit Fraction Edge Lengths
- Volume of a Rectangular Prism with Fractional Edge Lengths
- Word Problem Involving the Volume of a Rectangular Prism
- Word Problem Involving the Rate of Filling or Emptying a Rectangular Prism
- Volume of a Triangular Prism
- Word Problem Involving the Volume of a Triangular Prism

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# Vertices, Edges, and Faces of a Solid

Solid shapes have attributes like face, vertices, edges that describe them.

Individual flat surfaces are called faces. Faces meet in straight lines called edges and points called vertices.

**Edges** − The line segments that form the skeleton of the 3D shapes are called edges.

**Faces** − Flat surfaces enclosed by edges are called faces. A face of a solid shape is a plane or 2d figure.

**Vertices** − The corners where the edges meet are called vertices.

A rectangular prism has 6 faces 8 vertices and 12 edges.

A square pyramid has 5 faces 5 vertices and 8 edges.

Determine the faces, vertices and edges of the following shape.

### Solution

**Step 1:**

The given shape is a square pyramid.

**Step 2:**

It has 5 faces, 5 vertices, and 8 edges.

Determine the faces, vertices and edges of the following shape.

### Solution

**Step 1:**

The given shape is a cylinder.

**Step 2:**

It has 2 faces, 0 vertices, and 0 edges.