- trebly asymptotic triangle
- трижды асимптотический треугольник
English-Russian scientific dictionary. 2008.
English-Russian scientific dictionary. 2008.
Ideal triangle — In hyperbolic geometry an ideal triangle is a hyperbolic triangle whose three vertices all lie on the circle at infinity. In the Poincaré disk model an ideal triangle is bounded by three circles which intersect the boundary circle at right angles … Wikipedia