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Area for Kids. *Kiddle Encyclopedia.*

**Area** is the amount of space a two dimensional (flat) surface takes up. It is useful because it is how much of a material is needed to make a hollow container; for example, how much wood is needed to make a wardrobe.

You can use different formulas to find the area of different shapes.

- Area of a rectangle is the length of any two touching sides multiplied together. In other words, length times width.
- Area of a triangle is half of the base multiplied by the perpendicular height. This can be found using the trigonometry formula, .
- Area of a circle: .

The area of a flat object is related to the surface area and volume of a three-dimensional object.

The area under a curve can be found using integration, from calculus.

Some units used to measure area are square mile and square kilometre.

All content from Kiddle encyclopedia articles (including the article images) can be freely used under Attribution-ShareAlike license, unless stated otherwise. Cite this kids article:

Area for Kids.