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平面解析几何与平面几何有着紧密的联系 ,因此 ,平面几何的某些结论在解析几何中仍起着不可估量的作用 .适时而且恰当借助平面几何的有关结论来进行转换 ,可以创造出非常简洁的解题方法 .下面就举例简析之 :例 1.过点A(- 2 ,0 )作圆x2 +y2 =1的割线ABC ,则弦BC的中点P的轨迹方
Plane analytical geometry is closely related to plane geometry. Therefore, some conclusions of plane geometry still play an inestimable role in analytic geometry. It is possible to create a very simple and timely transformation of the relevant conclusions of plane geometry. The problem solving method. The following is an example of a brief analysis: Example 1. A (-2,0) as the circle cut x2 + y2 = 1 secant ABC, the midpoint P of the chord BC track side