More characterizations of tangential quadrilaterals - Martin Josefsson

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    More characterizations of tangential quadrilaterals - Martin Josefsson​

    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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    LTTK CTV, 9/10/19
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