The Triangle Altitudes Theorem in Hyperbolic Plane Geometry
arXiv:1912.11707
Abstract
We provide a new formulation and proof of the triangle altitudes theorem in hyperbolic plane geometry, together with an easily computed discriminant to distinguish between different basic configurations of the altitudes of such a triangle.
15 pages. Keywords: Hyperbolic triangle, triangle altitude, hyperbolic plane. 2010 Mathematics Subject Classification: 51M10, 51M15