so you have a quarter circle
this area is equal so 1/4 of total area
find total area and diviby by 4
area=pi r^2
diameter=2r
diameter/2=r
diameter=5
5/2=r=2 and 1/2=2.5
equation is now
3.14 times 2.5^2
3.14 times 6.25
19.625
that is total area
now divide by 4
19.625/4=4.9 ft
round to nearest foot
5
answer is 5 ft^2
