Question 1157145
<pre>
Since the diameter is 32 feet, the radius is 16 feet:

{{{matrix(5,3,
A,""="",expr(1/2)*theta*r^2,
A,""="",expr(1/2)*expr(3pi/5)*16^2,
A,""="",expr(1/2)*expr(3pi/5)*256,
A,""="",128*expr(3pi/5),
A,""="",expr(384/5)*pi)
}}}

Edwin</pre>