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, 2004 AND Mathematical Studies Standard Level Peter Blythe, Jim Fensom, Jane Forrest and Paula Waldman de Tokman Oxford University Press, 2012

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)

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.

Practice Find the area of:

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

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.