Assuming you know the radius or diameter...
(Pi) x (radius) x (radius) or (1/4 Pi) x (diameter) x (diameter) will give you the area.
By dividing the diameter by 2 will give the circle's radius. Area of any circle = pi*radius squared.
Area of any circle = pi*radius squared
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.
Area of circle = PI * R2In A1 enter radius of circle (e.g. 4).In B1 enter this formula: =PI()*A1^2Observe in B1 the number as the area of a circle with radius of 4.
It says so in the formula
Pi times the square of the radius.
It is: (pi*radius2)/4
Yes. That is often how pie charts work.
The area sector of a circle needs pi to work it out.
The radius is 1.27
Find the radius of the circle (if it gives you the diameter just half it to get the radius) and then square it. Then times your answer by pie. So the formula is: A= pie (r squared) P.S. Sorry I couldn't get the mathematical symbols!
The area of a circle is equal to that of a triangle whose base has the length of the circle's circumference (distance around the circle) and whose height equals the circle's radius which comes to Pi multiplied by the radius squared. Area of Triangle 1/2 *base*height