6th Grade · Geometry
Surface Area
6.G.A.4
Definition
The total area of all the outer faces of a three-dimensional figure.
Examples
- A cube with six 4-square-unit faces has surface area = 6×4 = 24 square units.
- Add up each face's area to find the total surface area.
Key rule
Surface area is the sum of the areas of all faces.
Memory hook
Add up every face's area.