First cut off for now the rectangle at the top. Ok so now do 75X15 = 1,125. Now we know that's the area if we cut off the top. Now do just the top 10X25=250. Now add 1,125+250= 1,375. is the area
First we need to find a common denominator

=

now we can add them

+

=
Do the area of the circle as a whole minus (72/360 x radius^2) and then minus the other grey area.
1/4 is equivalent to 5/20