For this case, the first thing you should know is that they are giving you the area of a quarter of a circle.
We have then:
A1 / 4 = 30.25pi cm ^ 2
What you must do to find the area of the shaded region, is to subtract the area from the triangle.
We have then:
At = (1/2) * (11) * (11)
At = 60.5 cm ^ 2
The area of the shaded region is:
A = A1 / 4 - At = 30.25pi cm ^ 2 - 60.5 cm ^ 2
A = (30.25pi - 60.5) cm ^ 2
Answer:
A = (30.25pi - 60.5) cm ^ 2
option 3