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七年级数学法则

更新时间: 2020-06-30 00:00:00     

1、过两点有且只有一条直线;

2、两点之间线段最短;

3、同角或等角的补角相等;

4、同角或等角的余角相等;

5、过一点有且只有一条直线和已知直线垂直;

6、直线外一点与直线上各点连接的所有线段中,垂线段最短;

7、平行公理经过直线外一点,有且只有一条直线与这条直线平行;

8、如果两条直线都和第三条直线平行,这两条直线也互相平行;

9、同位角相等,两直线平行;

10、

关键词: 年级 数学 法则

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