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Concept

Area

Area measures the space inside a two-dimensional figure. The areas of the following figures can be shown as a green region by pressing the button below the figure.
Square Triangle Crescent Donut Area Animation
Different shapes may have different formulas to calculate their areas.
Figure Formula
Square
Rectangle
Triangle
Circle

Three-dimensional shapes can also have their area measured. In this case it is referred to the surface area of the shape, which can be visualized with the help of a net of the solid.

Net of a solid with pentagon bases.

Area is measured in square units. A square unit is defined as the area of a square with side length of unit. For example, a square inch is the area of a square with side length of inch.

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