《圆》同步检测题1(附答案)
http://t.cn/Ri466E4第六单元《圆》同步检测题(时量:40分钟总分:100分)一、填空题。(20分,每空2分)1.两端都在圆上的线段中,()最长。2.半径是6厘米的圆的周长比半径是8厘米的圆的周长小()厘米。3.把一个圆平均分成若干个扇形,可以拼成一个长方形,这个长方形的长相当于圆的()的一半,宽相当于圆的()。在剪拼前后,圆的面积()(填“变了”或“没变”),长方形的面积等于长×宽,所以圆的面积等于圆周长的一半×()。4.一个圆的半径扩大到原来的4倍,周长扩大到原来的()倍,面积扩大到原来的()倍。5.在一个半径是10厘米的圆内画一个最大的正方形,这个正方形的面积是()平方厘...
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