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“平行线”这一单元的主要考点有: 一、有关平行线的判定与性质例1如图直线a、b都与直线c相交,给出下列条件:①∠1=∠2;②∠3=
The main points of the “parallel line” unit are: 1. Judgment and properties of the parallel lines Example 1 The lines a and b intersect with the line c. The following conditions are given: 1∠1=∠2; 2∠3 =