Area of a Circle
Area enclosed by a circle of radius r.
Variables
- A
- Area
- r
- Radius
Explanation
Slice the circle into thin sectors and rearrange them into an almost-rectangle of width and height . Circumference is .
Example
: .
Try it: Area Calculator
Calculate the area (and perimeter) of rectangles, squares, circles, triangles, trapezoids, parallelograms and ellipses.