In the circle above, three right angles have vertices at the center of the circle. If the radius of the circle is 8, what is the combined area of the shaded regions?
A. 8
B. 9
C. 12
D. 13
E. 16
Spoiler: ::
Attachment:
2019-01-10_1358.png
In the circle above, three right angles have vertices at the center of the circle. If the radius of the circle is 8, what is the combined area of the shaded regions?
A. 8
B. 9
C. 12
D. 13
E. 16