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 offtopic by Neil Hoffman, Alexandre Eremenko, Chris Godsil, Yemon Choi, Gabriel C. DrummondCole Dec 9 at 5:40
This question appears to be offtopic. The users who voted to close gave this specific reason:
 "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. DrummondCole

2I 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