单项选择题
按照图画出所示图形,求阴影区域的面积。()
A.2402.5055 B.2402.0555 C.2402.5505 D.2402.5550
A.1029.7229 B.1029.2729 C.1029.7292 D.1029.7922
A.799.0126 B.799.0621 C.799.0162 D.799.0612