Key learning points

1. There are many different types of pyramid.
2. The apex of the pyramid is not necessarily above the centre of the base.
3. Although the base is a polygon, the sides are always triangles.
4. The surface area of a pyramid is the sum of the area of all the faces.

Keywords

• Pyramid - A pyramid is a 3D shape that has a polygonal base and triangular faces that meet at an apex.

• Apex - The apex is the point (vertex) which is the greatest perpendicular distance from the base.

• Right pyramid - When the apex lies directly above the centre of the base, then it is called a right pyramid.

• Oblique pyramid - An oblique pyramid is when the apex is not directly above the centre of the base.

Common misconception