Rational Pentagon Using ABC and OI

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In a rational polygon, the distance between any two vertices is a rational number.


In this Demonstration, rational values , are used to generate a rational pentagon , where and are the circumcenter and incenter of triangle [1].

For some settings, is one of the excenters instead, but this still gives a rational pentagon.


Contributed by: Minh Trinh Xuan (August 27)
Open content licensed under CC BY-NC-SA



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