在近几年各地的中考试题中,与圆的切线相关的题型屡见不鲜.解决这类题型的关键是熟练、灵活地运用好圆的切线的相关定理.本文以下面一道题的解答为例来谈谈圆的切线的相关定理在解题中的运用.题目:如图1,AB是⊙O的直径,CD是⊙O的切线,切点为C,过点B作BD⊥CD于D,交⊙O于点E,过点 In the mid-term exam questions in various places in recent years, the questions related to the tangent of the circle are common. The key to solving this type of question is to use the related theorem of the tangent of the circle skillfully and flexibly. This article takes the solution of the following question as an example. Let’s talk about the use of the related theorem of the tangent of the circle in the problem solving. Title: As shown in Figure 1, AB is the diameter of ⊙O, CD is the tangent of ⊙O, the cut-point is C, and B is the point for BD⊥CD in D. , copulating O at point E, passing