The half circle shown above has a radius of 6 and ...
单选题

The half circle shown above has a radius of 6 and the center is D. If AC⊥BD, what is the area of the shaded region?

发布日期:2021-08-06

A.18π-9

B.18π-18

C.

D.36π-9

E.36π-18

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