Question

prove that area of cricle is πr²​

Answer 1

Step-by-step explanation:

As we know, the area of circle is equal to pi times square of its radius, i.e. π x r2. To find the area of circle we have to know the radius or diameter of the circle.

For example, if the radius of circle is 7cm, then its area

will be:

Area of circle with 7 cm radius = πr2 = π(7)2 = 22/7 x 7 x 7 = 22 x 7 = 154 sq.cm.

Also, if we know the circumference of the circle, then we can find the area of circle.

How?

Since, the circumference is 2 times of product of pi and radius of circle, such as:

C = 2πr

Therefore, here we can find the value of radius,

r = C/2π

Once, we have evaluated the value of radius, we can easily find the area

....hope helps