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圆的标准方程,一般方程及参数方程是同学们比较熟悉的圆的方程三种形式,是高考必考点之一,也是同学们必需掌握的内容,但圆的直径式方程,虽然考纲没有明确要求,但一些与圆的直径有关的问题,若巧妙利用圆的直径式方程求解,常能化繁为简,化难为易,收到事半功倍的效果!本文列举数例阐述圆的直径式方程的妙用,以期达到抛砖引玉之效.
The standard equation of the circle, the general equation and the parametric equation are three forms of the circle equation familiar to the students. It is also one of the necessary examinations for the college entrance examination. It is also necessary for the students to grasp the content. However, although the diameter equation of the circle does not have a clear requirement , But some of the problems related to the diameter of the circle, if clever use of circular diameter equation to solve, often can be complicated, simplification is easy, get a multiplier effect! This article lists a few examples of circular equations of magic , In order to achieve the effect of throwing bricks and stones.