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1. In circles radius is denoted as r and area is a. what is the relation between a and r.2. is radius proportional to area.why?​

Answer»

Solution 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}a=πr

2

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



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