三年级数学下册二《图形的运动》轴对称(一)习题北师大版.doc

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1轴对称(一) 操作题1. 下列图形是轴对称图形吗?如果是,分别画出它们的对称轴。2. 画出下列图形的对称轴。23. 已知图中的图形都是轴对称图形,请你画出它们的对称轴4. 画出下面图形的对称轴,使得他们是轴对称图形。5. 两个大小不同的圆可以组成多种图形,请找出每个图形的对称轴,并指出它们的对称轴有什么共同特点6. 试找出如图所示的每个正多边形的对称轴的条数,并填下表中正多边形的边数 3 4 5 6 7 8对称轴的条数3答案1. 都是轴对称图形2. 略3. 略4. 略5. 都经过圆心6. 3 4 5 6 7 8

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