Step-by-step explanation:
You're only finding half of a circle but since you have 2, it is possible to just do the area of a circle which is [tex]\pi r ^{2} [/tex]
3.5 x 3.5 = 12.25
Because the radius of your circle is 3.5m but there are 2 of them you subtract 7 from 18 which give you 11:
Then you multiply 11 by 7.
= 77
Then add it all together.
[tex]a = (77 + 12.25\pi)m^{2} [/tex]
