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101.36 On the area of a tangential quadrilateral

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. 495 - 497
Copyright
Copyright © Mathematical Association 2017 

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References

1. Josefsson, M., Further characterisations of tangential quadrilaterals, Math. Gaz. 101 (November 2017) pp. 401–411.CrossRefGoogle Scholar
2. Grinberg, D., Circumscribed quadrilaterals revisited (2012), available at http://www.cip.ifi.lmu.de/~grinberg/CircumRev.pdf Google Scholar
3. Josefsson, M., Calculations concerning the tangent lengths and tangency chords in a tangential quadrilateral, Forum Geom. 10 (2010) pp. 119–130.Google Scholar
4. Wikipedia, https://en.wikipedia.org/wiki/Tangential_quadrilateral, accessed October 27, 2016.Google Scholar
5. Lieber, H. and von Lühmann, F., Trigonometrische aufgaben, L. Simion, Berlin, Dritte Auflage (1889), p. 190.Google Scholar