Area of Circles

The area of circles is derived by dividing a circle into an infinite number of wedges formed by radii drawn from the center. When these wedges are rearranged, they form a rectangle whose height is the radius of the circle and whose base length is half of the circumference of the circle. The area of circles are also used in sectors, segments and annuluses.

Videos

$How to derive the formula to calculate the area of a circle.$
$How to calculate the area of a circle if a diameter is given.$
$How to find the circumference of a circle if the area is given.$
$How to calculate the area in a problem where a rope or leash is tied to an object.$