选择题
2000 AMC 8 Problem 19: Three Circular Arcs
Three circular arcs of radius 5 units bound the region shown. Arcs AB and AD are quarter-circles, and arc BCD is a semicircle. What is the area, in square units, of the region?
A.
25
B.
10 + 5π
C.
50
D.
50 + 5π
E.
25π