第五单元测试卷4(含答案)
第五单元测试卷(二)1.填空题。(1)一个车轮的直径为55cm,车轮转动一周前进( )m。(2)当圆规两脚间的距离为4cm时,画出的圆的周长是( )cm。(3)两个圆的半径分别是3cm和5cm,它们直径的比是( ),周长的比是( ),面积的比是( )。(4)一个圆环的外圆直径是10cm,内圆直径是8cm,这个圆环的面积是( )cm2。(5)把一根长12.56dm的铁丝弯成一个圆(接口处不计),圆的直径是( )dm,面积是( )dm2。(6)完成下表。2.判断题。(对的在括号里画“√”,错的画“✕”)(1)直径总比半径长。( )(2)圆心决定圆的位置,半径决定圆的...
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