English

The Four Hagge Circles

Metric Geometry 2010-07-19 v1

Abstract

The four Hagge circles of the triangles BCD, ACD, ABD, ABC of a cyclic quadrilateral ABCD with respect to an appropriate common axis of inverse similarity share many features which are analysed.

Cite

@article{arxiv.1007.2761,
  title  = {The Four Hagge Circles},
  author = {Christopher J Bradley},
  journal= {arXiv preprint arXiv:1007.2761},
  year   = {2010}
}

Comments

8 pages, 2 figures

R2 v1 2026-06-21T15:48:54.466Z