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在平面几何上有些与椭圆有关的问题,用压缩变换来解决则显得比较简单。 所谓压缩变换,就是将每个点P(x,y)变为另一个点P′(x′,y′),使得P点的横坐
In the plane geometry, there are problems related to the ellipse. It is relatively simple to use the compression transformation to solve it. The so-called compression transformation is to change each point P(x, y) to another point P’(x’, y’) so that the P point is traversed.