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 (cm

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

Area = Pi x (Radius)

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

Or

Diameter = Radius x 2

(Note that while 2xradius=diameter, r

Hope circle area is no problem for you now!

^{2}).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

Or

Diameter = Radius x 2

(Note that while 2xradius=diameter, r

^{2}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!