To prove the formula you need to integrate the function y = +sqrt(1 - x2) between the limits x = -1 and x = +1, and then double the result to allow for the area under the x-axis.
Better still, use polar coordinates and double integrate rdrdA where r goes from 0 to R, the radius of the circle, and the angle A goes from 0 to 2*pi.
The result can be VERIFIED by comparing the area and the radius but that is not proof.
the formula for the area of a circle is 3.14 x radius squared
The formula for the area of a rectangle is length x breadth. In order to prove this works, work out an area of a rectangle using that formula.
The area of a circle can be found with the formula (pi)r^2
The formula for the area of a circle is πr2, or pi x radius^2 The radius of a circle is the diameter divided by two, and pi is approx. 3.1415926535
You get the largest area with a circle. Divide the perimeter by (2 x pi), then calculate the area with the formula pi x radius2.You get the largest area with a circle. Divide the perimeter by (2 x pi), then calculate the area with the formula pi x radius2.You get the largest area with a circle. Divide the perimeter by (2 x pi), then calculate the area with the formula pi x radius2.You get the largest area with a circle. Divide the perimeter by (2 x pi), then calculate the area with the formula pi x radius2.
the formula for the area of a circle is 3.14 x radius squared
The formula to find the area of a circle is: A = pi * r2
The formula for the area of a rectangle is length x breadth. In order to prove this works, work out an area of a rectangle using that formula.
The area of a circle can be found with the formula (pi)r^2
Area formula for circle= --,,- r 2
The formula for double the area of a circle
The formula to find the area of a circle is pi x the radius squared.
Area of a circle = pi*radius2
There is no specific formula for a sector of a circle. There is a formula for its angle (at the centre), its perimeter, its area.
The formula for the area of a circle is: Area = (pi) x (Radius)2 . When you know the radius of the circle and you use it to calculate the area of the circle, the result will be equal to (pi) x (Radius)2 .
In order to convert the area of a circle to the circumference of the circle, divide by the radius and multiply by two. The formula for the circumference of a circle is pi times the diameter.
Area of a circle = pi*radius squared