Original sentence: Hyperbolic angles can be motivated by considering a geometry (now usually called Pseudoeuclidean or Minkowski geometry) where, unlike Euclidean geometry, two directions are considered to be orthogonal not if they meet at 90° as in Euclidean geometry, but if they have opposite slopes
Edited sentence: Hyperbolic angles can be motivated by considering a geometry (now usually called Pseudoeuclidean or Minkowski geometry) where, unlike Euclidean geometry, two directions are considered to be hyperbolic-orthogonal not if they meet at 90° as in Euclidean geometry, but if they have opposite slopes