Area of a Circle

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Circle is a geometric figure in math which has a fixed distance from every point on its plane. The area of a circle is the region that is enclosed within the circle. The area of the circle is calculated by the formula π × r2. Here r is called the radius which is the fixed distance from the center to any point on the circle and π is a constant with a value of 3.14.


Example 1: What is the area of the circle which has the radius r of 6 cm?



The radius of the given circle is 6 cm, i.e. r = 6 cm.

The formula for area of the circle is = π × r2

Here the value of pi = 3.14

This makes the solution = 3.14 * 6cm * 6cm = 113.04 cm2.

The area of the given circle with radius 6 cm is 11 cm2approximately.

Hence, Area = 113 cm2



Example 2: What is the area of the circle which has the radius r of 3 cm?



The radius of the given circle is 6 cm, i.e. r = 3 cm.

The formula for area of the circle is = π × r2.

Here the value of pi = 3.14

This makes the solution = 3.14 * 3 cm* 3 cm = 28.26 cm2.

The area of the given circle with radius 3 cm is 28.3 cm2 approximately.

Hence, Area = 28.3 cm2

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