「中考数学」轴对称与中心对称(图形的变化)
轴对称:
(1)成轴对称的两个图形是全等图形;
(2)成轴对称的两个图形只有一条对称轴;
(3)对应点连线被对称轴垂直平分
中心对称:
(1)成中心对称的两个图形是全等图形;
(2)成中心对称的两个图形只有一个对称中心;
(3)对应点连线交于对称中心,并且被对称中心平分
![](http://pic.ikafan.com/imgp/L3Byb3h5L2h0dHBzL2ltYWdlMTA5LjM2MGRvYy5jbi9Eb3dubG9hZEltZy8yMDIxLzEwLzIwMjEvMjMyNDg2MjIxXzFfMjAyMTEwMjAwOTU1MzI4MzM=.jpg)
![](http://pic.ikafan.com/imgp/L3Byb3h5L2h0dHBzL2ltYWdlMTA5LjM2MGRvYy5jbi9Eb3dubG9hZEltZy8yMDIxLzEwLzIwMjEvMjMyNDg2MjIxXzJfMjAyMTEwMjAwOTU1MzI5NzQ=.jpg)
![](http://pic.ikafan.com/imgp/L3Byb3h5L2h0dHBzL2ltYWdlMTA5LjM2MGRvYy5jbi9Eb3dubG9hZEltZy8yMDIxLzEwLzIwMjEvMjMyNDg2MjIxXzNfMjAyMTEwMjAwOTU1MzM1MDU=.jpg)
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(1)成轴对称的两个图形是全等图形;
(2)成轴对称的两个图形只有一条对称轴;
(3)对应点连线被对称轴垂直平分
(1)成中心对称的两个图形是全等图形;
(2)成中心对称的两个图形只有一个对称中心;
(3)对应点连线交于对称中心,并且被对称中心平分