Question

the relation between radius (r) and area (a) is

Answer 1

Suppose we have a circle with radius (r).

Now we can find the relation between radius and area of circle as follows:

The Area of circle is product of pi and square of radius of circle.

Pi is a constant whose value is 22/7 or 3.14.

So we can write the relation in numerical form as follows:

$a=\pi r^{2}$

where a is area of circle and r is radius of circle.

Answer 2

Answer:

Suppose we have a circle with radius ( r )

Now we can find the relation between radius and area of circles as follows:

The Area of circles is product of pi and square of radius of circles

Pi is a constant whose value is 22/7 or 3.14

So we can write the relation in numerical form as follows:

$a \: = \: \pi \: r { }^{2}$

where a is area of circle and r is radius of circle