Math Dictionary / Surface Area

Surface Area

Surface area is the total area of all outside faces of a three-dimensional figure.

GeometryGrade 6Grade 7Grade 8GEDSATACT

What it means

It is measured in square units.

Also called: outside area

Examples

A cube has 6 square faces
A rectangular prism surface area adds all face areas
Paint on a box relates to surface area

Common mistake

Surface area uses square units, while volume uses cubic units.

Try one

Question: Does surface area measure inside space or outside faces?

Show answer

Outside faces.

Related terms

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