# Calculating a side in hyperbolic polygon [on hold]

if I have a hyperbolic quadrilateral ABCD such that $$\angle A=\angle B=\frac{2\pi}{3}$$, $$AD=BC$$ and we know the hyperbolic lengths of sides $$AB$$ and $$CD$$, how can I calculate the hyperbolic length of $$AD$$?

## put on hold as off-topic by Neil Hoffman, Alexandre Eremenko, Chris Godsil, Yemon Choi, Gabriel C. Drummond-ColeDec 9 at 5:40

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• "MathOverflow is for mathematicians to ask each other questions about their research. See Math.StackExchange to ask general questions in mathematics." – Neil Hoffman, Chris Godsil, Yemon Choi, Gabriel C. Drummond-Cole
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• I think this question would be more appropriate to Math Stack Exchange. – Lubin Dec 7 at 16:00
• What does hyperbolic quadrilatral mean – greedoid Dec 7 at 17:01
• i wrote it in math stack exchange now – user164226 Dec 7 at 18:36