Key learning points

1. The surface area of a 3D shape is the sum of the area of all the faces.
2. The net of a cuboid can help find the surface area.
3. The surface area of a cuboid can be found without drawing the net.

Keywords

• Surface area - the total area of all the surfaces of a closed 3D shape. The surfaces include all faces and any curved surfaces.

• Net - The net of a 3D object is a 2D representation of its surfaces that can be folded up into the 3D object.

Common misconception