Answer:
197.82 m^2
Explanation:
The area of a circle is
a = πr^2 The radius is half of the diameter. They give us the diameter so we need to talk half of that number to use for the diameter. The diameter is the length from the center of the circle to the edge of the circle.
We will find the area of the big circle and subtract out the area of the little circle to bind the blue area.
Outer circle
a = πr^2
a = 3.14(12)^2
a = 3.14(144)
a = 452.16
Inner Circle:
a = πr^2
a = 3.14(9)^2
a = 3.14(81)
a =254.34
Lastly, subtract 254.34 from 452.16 to get 197.82