The formula for the area of a circle is given by pi times radius times radius.
The formula for circumference of a circle is 2 times pi times radius.
As area is known, the radius is easy to work out, like this
From Area = pi X r X r
then
radius = (square root of (area/ pi))
From circumference = 2 X pi X radius
then
Circumference = 2 X pi X (square root of (area/pi))
This can be simplified to
Circumference = 2 sqrt(pi X area)
You will remember that pi stands for an endless decimal ratio that starts 3.142...
A:4*pi*r2. because surface area is equal to circumference of circle.
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.
The circumference of a circle divided by its diameter is the value of pi and pi has a wide range of uses some of which are:- Finding the volume of a sphere Finding the surface area of a sphere Finding the volume of a cone Finding the volume of a cylinder Finding the area of a circle Finding the circumference of a circle
The radius of a circle is the distance from the center to any point on the circle. The area is the space within the circle. The formula to find the area is πr2. r stands for the radius of the circle. If you want to find the radius, you can work backwards from the area or the circumference, which is the perimeter of the circle. The formula for circumference is 2πr.
Suggestion: Divide the circumference by (2 x pi) to get the radius. Then use the standard formula for the area of a circle.
Circumference of a circle is (pi * diameter). Area of a circle is (pi * r2).
4*pi*r2. because surface area is equal to circumference of circle.
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.
The formula for the circumference of a circle is: radius (x) 3.14 (pi) Area is... Radius2 x 3.14
They both use pi:- circumference = 2*pi*radius or diameter*pi area = pi*radius2
The formula for the area of a circle is pi * radius squared. The circumference of a circle's formula is pi * diameter. NOTE: pi equals approx. 3.14
Divide the circumference by (2 x pi) to get the radius. Then use the formula for the area of the circle.
No because the formula for finding the area of an oval, which is an ellipse, is quite different
The circumference of a circle divided by its diameter is the value of pi and pi has a wide range of uses some of which are:- Finding the volume of a sphere Finding the surface area of a sphere Finding the volume of a cone Finding the volume of a cylinder Finding the area of a circle Finding the circumference of a circle
If you have the circumference: circumference = (pi) * diameter diameter = circumference / (pi) If you have the area: area = (pi) * radius * radius radius = square_root(area / pi) radius = diameter / 2 diameter = 2 * square_root(area / pi)
c=TT R Given the area, the radius = square root (area / Pi). Given the circumference, the radius = circumf/ 2Pi.
Divide the circumference by pi, and that will give you the diameter. Then take half of the diameter (the radius), and plug it into the formula for the area of a circle (A=πr²)