Area of a circle

Introduction to area of a circle:
Area is the measure of surface occupied by an object. The standard unit for measurement of area is metres quare (m2).However the area of smaller dimensions can be expressed in mm2 or cm2. The areas of large dimensions can be expressed in acre or hectare.

We can find the area of a circle by using the formula as, A=πr². Here r is the radius of a circle.

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Formula of Area of a Circle:
Formula:We can find the area of a circle by using the formula as,

        Area A=pr2

Here r is represents the radius of the circle and then the value of p is `22/7`  or 3.14. The radius is squared in an area of circle formula. A distance between the center and any point of a circle is called radius.

A distance surrounding on a circle is called circumference and diameter of a circle is defined as a distance across a circle via the center of a circle.

Steps: How to calculate the Area of circle

 Find out the radius of a circle from a given problem.
 We can apply the formula for Area of circle.
         Area A= pr2

 Multiplying the square of the radius and the value of p.
 Finally we get the solution.

Examples of Area of a Circle:

Ex 1: Find the area of circle with radius equal to 6.5 inch using p = 3.14

Solution:The Area of circle as, A=pr2

Substitute the values of radius and p.

Therefore, A= (3.14 * 6.5*6.5)

Squaring the radius and then multiplying with 3.14 and then we get,

Area=3.14 * 42.25                                                

Area=132.67 square inch.

Ex 2: Find the Area of circle with the radius of 10 feet with taken the value of p = 3.14.

Solution: Formula for Area of circle, A=pr2

Substitute the values of radius and p.

A=3.14*10*10

Squaring the radius and then multiplying with 3.14 and then we get,

Area=3.14*100

Area=314 square feet.