立体几何中,角的求法是一个很重要的问题,解决起来也比较吃力,本文对这一类问题的解决给出了几种常用的方法。根据定义找出或作出所求的角,然后通过解三角形等方法求值,注意“作、证、算”的有机统一.解题时注意各种角的范围:异面直线所成角的范围是0~0<θ≤900,其方法是平移法和补形 Stereo geometry, the angle of the law is a very important issue, it is also more difficult to solve, this article gives some common solutions to this problem. According to the definition to find or make the required angle, and then by solving the triangle and other methods of evaluation, pay attention to “organic, card, count,” the organic unity .Consider the problem of various angle range: The range is 0 ~ 0 <θ ≤ 900, the method is the translation method and fill shape