直线比射线长吗
- 时间:2020-04-13 17:06:25
- 分类:数学世界
- 阅读:155 次
直线比射线长吗?这是一道判断题,如果说“直线比射线长。”是对还是错呢?
数学题解答:首先,我们要弄清两者的特点:
直线:无限长,没有端点,可以向两端无限地延伸。
射线:无限长,有一个端点,可以向一端无限延长。(例如手电筒发出的光,可以看成射线在生活中的范例)
下面来说明前面的问题,既然直线和射线的特性中都提到了它们是无限长的,也就是没有确定的长度,所以是无法比较它们的长短的。因为它们根本就没有固定的长度。不管是向一端延伸,还是向两端延伸,都是无限长的。
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