1. Material Taken From: Mathematics for the international student Mathematical Studies SL Mal Coad, Glen Whiffen, John Owen, Robert Haese, Sandra Haese and Mark Bruce Haese and Haese Publications, AND Mathematical Studies Standard Level Peter Blythe, Jim Fensom, Jane Forrest and Paula Waldman de Tokman Oxford University Press, 2012

2. Surface Areas of 3D Solids
The surface area of a solid is the sum of the area of all its faces. Surface area is measured in square units, cm2, m2, etc.
Type 1: Surface area of solids with all their faces plane (e.g. prisms, pyramids)

3. Solids with Plane Faces
Surface Areas of 3D Solids
Solids with Plane Faces
Surface area of a solid with plane faces is the sum of the areas of the faces.

4. Practice
Find the area of:

5. Find the surface area of the rectangular prism:
Practice
Find the surface area of the rectangular prism:

6. This solid is called a regular tetrahedron.
Practice
Find the surface area of a triangular-based right pyramid with all the edges 5 cm.
This solid is called a regular tetrahedron.