第五单元测试卷5(含答案)
第5单元达标检测卷一、填空。(每空1分,共21分)1.用圆规画一个直径是8cm的圆,圆规两脚张开的距离是()cm,所画的圆的周长是( )cm,面积是( )cm2。2.右图中,长方形的宽是( )cm,半圆形的周长是( )cm,圆的面积是( )cm2。3.大圆和小圆的半径比是3:2,它们的周长比是( ),面积比是( )。4.笑笑用一根长6.28m的铁丝做成一个圆形花环架,做成的花环架的直径是( )m,面积是( )m2。5.一块边长为1cm的正方形铁皮,剪成一个最大的圆,这个圆的周长是( )cm,剩余部分铁皮的面积是( )cm2。6.一个圆的周长为31.4m,若半...
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