求两条异面直线间距离的问题是立体几何教学中的一个难点.这里主要有两个问题:怎样确定两条异面直线的公垂线以及怎样求出此公垂线的长.本文介绍几种求法。一、辅助平面法如果已知两条异面直线互相垂直,那么可以寻找一个辅助平面,使它过其中一条直线且垂直于另一条直线,在辅助平面上,过 The problem of finding the distance between two different straight lines is a difficult point in the teaching of solid geometry. There are two main problems here: how to determine the vertical lines of two straight lines and how to determine the length of this vertical line. Several methods. First, the auxiliary plane method If it is known that two different surface straight lines are perpendicular to each other, then you can find an auxiliary plane, so that it passes one of the straight lines and perpendicular to the other straight line, in the auxiliary plane, over