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101.38 Metric relations in crossed cyclic quadrilaterals

Published online by Cambridge University Press:  16 October 2017

Martin Josefsson
Martin Josefsson*
Affiliation:
Västergatan 25d, 285 37 Markaryd, Sweden e-mail: martin.markaryd@hotmail.com
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Information
The Mathematical Gazette , Volume 101 , Issue 552 , November 2017 , pp. 499 - 502
Copyright
Copyright © Mathematical Association 2017 

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References

1. Dostor, G., Propriétés nouvelle du quadrilatère en général, avec application aux quadrilatères inscriptibles, circonscriptibles, etc. (in French), Archiv der Mathematik und Physik 48 (1868) pp. 245–348. Available at http://books.google.se/books?id=s6gKAAAAIAAJ Google Scholar
2. Alsina, C. and Nelsen, R. B., On the diagonals of a cyclic quadrilateral, Forum Geom. 7 (2007) pp. 147–149.Google Scholar
3. Coxeter, H. S. M. and Greitzer, S. L., Geometry revisited, Math. Ass. Amer. (1967).Google Scholar
4. de Villiers, M., Slaying a geometrical monster: finding the area of a crossed quadrilateral, Learning and Teaching Mathematics 18 (June 2015) pp. 23–28. Also available at http://dynamicmathematicslearning.com/crossed-quad-area.pdf Google Scholar
5. Hoehn, L., Circumradius of a cyclic quadrilateral, Math. Gaz. 84 (March 2000) pp. 69–70.Google Scholar