# Area

The **area** (formula symbol: $A$) is the size of a two-dimensional geometric figure.

The unit is expressed in square (e.g. $m^{ 2 }$).

Three-dimensional figures also have a so called **surface area**, which denotes the size of the entire surface.

The unit is also indicated in square here.

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### Hint

Each two-dimensional figure has its own formula for calculating the area. Formulas see formulary 2D.

For formulas on the surface area of objects, see formulas 3D.

For formulas on the surface area of objects, see formulas 3D.