Question

1.直线，射线和线段有什么区别？同一平面内的两条直线有哪几种位置关系？ 2.我们学过的角有哪几中？角的大

Answer 1

直线没有端点，可以向两边无限延长；射线有一个端点，可以向一个方向无限延长；线段有两个端点，有固定的长度。线段 射线，都是直线上的一部分。
两条直线有三种关系：相交，平行，重合。常用的有相交 平行（垂直等于相交）
学过的角有锐角、直角、钝角、平角、周角，周角最大。

Answer 2

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两条直线有三种关系：相交，平行，重合。常用的有相交 平行（垂直等于相交）
学过的角有锐角、直角、钝角、平角、周角，周角最大。赞同1| 评论

Answer 3

直线没有端点，可以向两边无限延长；射线有一个端点，可以向一个方向无限延长；线段有两个端点，有固定的长度。线段 射线，都是直线上的一部分。
两条直线有三种关系：相交，平行，重合。常用的有相交 平行（垂直等于相交）
学过的角有锐角、直角、钝角、平直线没有端点，可以向两边无限延长；射线有一个端点，可以向一个方向无限延长；线段有两个端点，有固定的长度。
两条直线有三种关系：相交，平行，重合。
学过的角有锐角、直角、钝角、平角、优角、劣角 赞同0| 评论(2) 角、周角，周角最大。

Answer 4

直线射线和线段有什么区别：直线没有端点，向两端无限延伸；射线只有一个端点，向另一端无限延伸；线段有两个端点，不能向两端无限延伸
同一平面的两条直线有3种位置关系：平行、相交、垂直（其中垂直是相交的特殊情况）
学过的角有锐角、直角、钝角、平角、周角
角的大小与形成这个角的两条边的位置有关，与边的长度无关

Answer 5

1.直线没有端点，可以向两边无限延长；射线有一个端点，可以向一个方向无限延长；线段有两个端点，有固定的长度。线段 射线，都是直线上的一部分。
两条直线有三种关系：相交，平行，重合。常用的有相交 平行（垂直等于相交）
2.学过的角有锐角、直角、钝角、平角、周角，周角最大。
3.角的大小和角的两边叉开的大小有关.
角的大小与两边张口的大小有关,张口越大,角越大;张口越小,角越小。和两边的长短无关。
4.由不在同一条直线上的三条边首尾相接组成的封闭图形叫做三角形，四边形类似；圆是一个没有棱角的图形，中心对称