Circle Area Calculator

What is a Circle ?

A circle is a geometric shape that consists of all points in a plane that are equidistant from a fixed point called the center. The distance from the center to any point on the circle is called the radius, and the longest distance across the circle, passing through the center, is called the diameter.

The formula for calculating the area (A) of a circle is given by:

A = πr²

where:

• A is the area of the circle
• π (pi) is a mathematical constant approximately equal to 3.14159265359
• r is the radius of the circle

So, to find the area of a circle, you square the radius and multiply it by the constant π. If you know the diameter (D), you can find the radius by dividing the diameter by 2 (r=D/2) and then use the formula for area.