急!在线等答案!用英语回答的数学题.Use a ruler and a protractor to draw 3 lines AB,BC and CD such that BC ⊥ AB and BC ⊥ CD.Are AB and CD parallel to each other?Explain your answer briefly.
问题描述：
急!在线等答案!用英语回答的数学题.
Use a ruler and a protractor to draw 3 lines AB,BC and CD such that BC ⊥ AB and BC ⊥ CD.Are AB and CD parallel to each other?Explain your answer briefly.
答
太有难度了，初中的东西，忘了，用中文我都不会解释了！祝你好运
答
不一定平行，如果三条直线在一个平面内，AB和CD是平行的，如果三条线不在同一平面内则是不平行的。
好了，自己翻译成英语吧
答
Yes,if the three lines are in a surface,AB and CD parallel to each other.Because BC ⊥ AB,BC ⊥ CD,so it is a rectangle,so AB and CD parallel to each other.If the three lines are not in a surface,AB a...