1. If the area of a circle is A, radius of the circle is r and circumference of it is C, then
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By: anil on 05 May 2019 01.51 am
Radius of circle is given $$r$$ Area of circle = $$A$$ = $$pi*r^2$$ => $$pi r$$ = $$frac{A}{r}$$ Circumference of circle = $$C$$ = $$2*pi*r$$ => $$pi r$$ = $$frac{C}{2}$$ Comparing both equations, we get : => $$frac{A}{r} = frac{C}{2}$$ => $$rC = 2A$$
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