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椭圆虽然是轴对称及中心对称图形,但是与圆相比,研究起来还是复杂一些,所以有些椭圆问题可转化为圆的问题来解决.椭圆化成圆的依据是伸缩变换
Although the ellipse is an axisymmetric and centrosymmetric graph, it is more complicated to study than a circle, so some elliptic problems can be solved by solving the problem of a circle.Ovalization into a circle is based on a telescopic transformation