# A pseudosphere

In the library Bolyai-Teleki, in Târgu Mureş (Romania), this label introduces the model of a pseudosphere, where we can see that, in hyperbolic geometry, there are more than one line that pass through a point and are parallel to a given line. We also see that the sum of the internal angles of a triangle is smaller than 180°.

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Hyperbolic geometry (Other geometries)