Rogério César dos Santos, 

Polygons on the sides of an octagon,
Forum Geometricorum, 18 (2018) 413--418.


Abstract. Van Aubel's theorem has some interesting generalizations. Some were dealt with by Krishna  (2018a and 2018b). In this article, we intend, encouraged by the works cited, to prove a new generalization of Van Aubel's theorem, which consists of the construction of a parallelogram from an octagon surrounded by regular n-sided polygons.

 

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