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( 2 ). ( 1 ). ( 3 ). ( 4 ). ( 7 ). ( 5 ). ( 5 ). ( 6 ). ( 7 ). ( 8 ). ( 9 ). ( 9 ). ( 1 ). ( 3 ). ( 7 ). ( 2 ). ( 5 ). ( 6 ). ( 9 ). ( 4 ). ( 8 ). 同一平面内. 不相交. 相 交. 判断对错。. 1、在一个平面内,不相交的两条直线互相平行。(  ). 对. 错. 2、两条直线相交,那么这两条直线互相垂直。( ). B. 3 、如图. A. 直线 B 叫垂线。( ).

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  1. (2) (1) (3) (4) (7) (5) (5) (6) (7) (8) (9) (9)

  2. (1) (3) (7) (2) (5) (6) (9) (4) (8) 同一平面内 不相交 相 交

  3. 判断对错。 1、在一个平面内,不相交的两条直线互相平行。(  ) 对 错 2、两条直线相交,那么这两条直线互相垂直。( ) B 3、如图 A 直线B叫垂线。( ) 错 4、不相交的两条直线叫平行线。( ) 错

  4. 人教版第七册 垂直与平行

  5. 小明的数学日记 今天,我学习了平行与垂直的知识,知道了 ①不相交的两条直线叫平行线。 ②同一平面内的两条直线不平行就一定相交。 ③两条直线相交,那么这两条直线互相垂直。

  6. 欣赏欣赏

  7. 生活中的平行线

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