题目内容
⊙O的半径为9cm,弧AB的长是5πcm,则扇形OAB的面积是_____cm2.
- A.22.5π
- B.25π
- C.45π
- D.100π
A
[{"type":"tigan","data":"⊙O的半径为9cm,弧AB的长是5πcm,则扇形OAB的面积是_____cm2<\/sup>."},{"type":"danxuan","data":{"A":"22.5π","B":"25π","C":"45π","D":"100π"},"ans":"A","perline":2}]
[{"type":"tigan","data":"⊙O的半径为9cm,弧AB的长是5πcm,则扇形OAB的面积是_____cm2<\/sup>."},{"type":"danxuan","data":{"A":"22.5π","B":"25π","C":"45π","D":"100π"},"ans":"A","perline":2}]
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⊙O的半径为9cm,弧AB的长是5πcm,则扇形OAB的面积是( )cm2.
A、22.5π | B、25π | C、45π | D、100π |