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在学习平行线的时候,我们通过实验探究获得了两个基本事实:1.经过直线外一点,有且只有一条直线与这条直线平行(平行公理);2.同位角相等,两直线平行(平行线的判定定理).在此基础上,我们还证明了其他两条平行线的判定方法(内错角相等,两直线平行;同旁内角互补,两直线平行);也可以运用反证法证明平行线三条性质中的一条,进而证明其它两条.这就是说,我们有了以上的两条
When studying parallel lines, we obtain two basic facts through experimental exploration: 1. There is only one straight line which is parallel to this straight line (parallel axioms) after passing a straight line; 2. Equal angles are equal and the two straight lines are parallel On this basis, we also prove the other two parallel lines of determination (the same within the wrong angle, the two straight lines parallel to the side of the corner complement each other, the two straight parallel), you can also use the proof of parallelism One of the three properties of the line, and then prove the other two.This means that we have the above two