Function/Examples/Area of Circle

Example of Function

The area of a circle is a function of its radius:

$\map A r = \pi r^2$

Proof

See Area of Circle.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): function (map, mapping)
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): function (map, mapping)