Circumscribed circumference

As in the Euclidean case, from the circumcenter we can plot the circumscribed circumference, with center the circumcenter passing through the three vertices. Once we have the circumcenter,
we can plot this circumference from the hyperbolic tool circumference for center and point giving the circumcenter as the center and one of the three vertex as the point. This construction is the same we used to find the circumference that goes through three given points, as it was commented on this construction, this circumference not always exists. Now, the existence of the circumscribed will depend on the existence of the circumcenter. In fact, given three points, a circumference through the three points will exists if and only if the circumcenter exists.



Triangles
Hyperbolic geometry