Answer:
[tex]A_s=179 \ yd[/tex]
Step-by-step explanation:
Area of Circle can be calculated using following formula
[tex]A=\pi r^{2}[/tex]
Where r is radius of circle
Area of outer circle (r=11 yd)
[tex]A_1=\pi (11)^{2}\\A_1=379.94 \ yd[/tex]
Area of inner circle (r=8 yd)
[tex]A_2=\pi (8)^{2}\\A_2=200.96 \ yd[/tex]
Area of shaded region
[tex]A_s=A_1-A_2[/tex]
[tex]A_s=379.94-200.96\\A_s=179 \ yd[/tex]
