More Characterizations of Tangential Quadrilaterals

نویسندگان

  • Martin Josefsson
  • Paul Yiu
  • M. Josefsson
چکیده

In this paper we will prove several not so well known conditions for a quadrilateral to have an incircle. Four of these are different excircle versions of the characterizations due to Wu and Vaynshtejn.

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تاریخ انتشار 2011