Question 382622
The area of a circle is {{{pi*r^2}}}.  A sector is a fraction of the circle.  The total degrees in a circle is 360, so the fraction is out of 360.  The formula you should use for the area of a sector is {{{pi*r^2*(degrees/360)}}}  Here, you will do: {{{pi*18^2*(30/360)}}}, which is approximately 84.823.