area of a circle

Calculus area_circle

Calculus in processing ... please wait

Function : area_circle

Summary :

area online calculator that can calculate the area of a circle from its radius or from its diameter.

Area_circle online

Description :

The calculator has several features allowing it to make surface calculations. It is thus possible to calculate the surface of a circle, also called area of a disc through area_circle function, but also the surface of a rectangle , or the surface of a square (which is a particular rectangle).

Calculating the area of a circle can be done from its radius or its diameter.

Calculating the area of a circle from its radius

The area of a circle is the area bounded by the circle. The area of a circle is given by the formula `pi*r^2` where r represents the radius of the circle.

Thus, calculating the area of a circle with radius 3 is done by typing the following formula area_circle(3) , after calculation, the result `9pi` is returned.

It is also possible to make symbolic calculation and calculate the area of a circle with radius 1+x, by typing the following formula area_circle(1+x) , after calculation, the result is returned.

Calculating the area of a circle from its diameter

If d is the diameter of the circle and its radius r, then the radius of a circle is equal to half of its diameter which is expressed by the formula `r=d/2`. From this formula, it is possible to determine the area of a circle from its diameter.

The area of a circle can be calculated from its diameter using the formula `pi*(d/2)^2`, where d is the diameter of the circle.

Thus, calculating the area of circle with diameter 5 is done by entering the following formula area_circle(5/2) , after calculation, the result `25/4*pi` is returned.


area online calculator that can calculate the area of a circle from its radius or from its diameter.


Syntax :

area_circle(radius) or area_circle(diameter/2)


Examples :

area_circle(3) returns `9pi`

Calculate online with area_circle (area of a circle)
See also :