The area of a circle is "pi" square units, then the radius of the circle is _____.
The area of a circle is 18 π sq. units. The area of a square of side having the same dimension as that of the radius of the circle is (sq. units)
The area of a circle is πd2 square units, then the radius of the circle is ___.
If the radius of a circle is 7√π cm, then find the area of the circle (in square cm).