How Do You Find Area Of A Circle?


5 Answers

Katie Harry Profile
Katie Harry answered
The area of a circle is the total number of square units in the circle. If you have a circle in a 1cmx1cm drafting paper, you can simply count the number of boxes in your circle. That would be your area in square cm (cm2).

However, a more reliable, efficient and commonly used formula for calculating area of circles is:

Area = Pi x (Radius)2

The value of pi is always constant at 22/7 which is equivalent to 3.142.
The radius is the distance from the center of the circle to one peripheral line. It is always half the value of the diameter. A diameter is a line stretching from one point on a circles boundary to another and passing through the center of the circle. It is basically two radii joined together at the center in a straight line.
So, if you have a question where you are given the diameter and you need to know the radius, simply divide the value of diameter by 2:

Radius = Diameter/2
Diameter = Radius x 2

(Note that while 2xradius=diameter, r2 is different. It is the radius multiplied with itself (radius x radius), while the diameter is radius + radius).

Hope circle area is no problem for you now!
Hira Zeeshan Profile
Hira Zeeshan answered
Very efficiently written information. It will be beneficial to
anyone who employess it, as well as myself. Keep doing what you are doing –
looking forward to more posts.Area of a Circle Triangle Square
Evelyn Vaz Profile
Evelyn Vaz answered
There's a formula to find out the Area of Circle. The formula being, A (circle) = Π r2, where 'r' is the radius of the circle and the value of Π is 22/7 or 3.14

So, if the radius of the circle is known, it's easy to find out the area of that circle.

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