Question

what is the area of circle

Answer 1

Area of the circle is πr^2

Answer 2

Formula for Area of circle

The formula to find a circle's area $$ \pi $$ (radius)2 usually expressed as $$ \pi \cdot r^2 $$ where r is the radius of a circle.

The area of a circle is all the space inside a circle's circumference. 
In the picture, the area of the circle is the part of the circle that is changing color.



Read more: http://www.mathwarehouse.com/geometry/circle/area-of-circle.php#ixzz5ORuHCA94