图中几条直线、几条射线、几条线段?

  • 时间:2020-04-22 15:41:35
  • 分类:数学世界
  • 阅读:114 次

图中几条直线、几条射线、几条线段?(四年级上册数学问题)

数线的问题,比较繁琐,可以采取有序思考的方法,逐一解决。

数直线时,根据直线特征:没有端点,向两端无限延长。

数射线时,根据射线特征:只有一个端点,向另一端无限延长。

数线段时,根据线线特征:有两个端点,有限长。

几条直线,几条射线,几条线段

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