专项提升卷4 圆
专项提升卷4 圆提升点1:圆的半径、直径、周长和面积间的关系1.填空。(1)如果两个圆的周长相等,那么它们的( )、( )和( )都相等。(2)一个圆的半径缩小到原来的,它的直径缩小到原来的( ),周长缩小到原来的( ),面积缩小到原来的( )。(3)有大、小两个圆,大圆直径是小圆半径的4倍,小圆与大圆周长的比是( ),小圆与大圆面积的比是( )。2.判断。(1)所有的直径都相等。( )(2)圆的直径是半径的2倍。( )(3)两个圆的直径相等,它们的周长也一定相等。( )(4)在一个圆里画的所有线段中,直径最长。( )(5)直径是3厘米的圆比半径是2厘米的圆大。( )...
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