triangle, n.
- þríhyrningur
-> acute 2, aliquot triangle, altitude, altitude theorem, asymptotic triangle, base 7, cevian triangle, circular triangle, congruence theorem, diagonal triangle, doubly asymptotic triangle, equiangular 4, equilateral triangle, height, leg 2, median 3, mid-perpendicular 3, orthic triangle, orthoptic triangle, Pascal's triangle, pedal triangle, perspective triangles, polar triangle, pythagorean triangle, regular triangle, right-angled triangle, right triangle, scalene triangle, scalenous triangle, self-polar triangle, similar triangle, spherical triangle, transversal 2, trebly asymptotic triangle, ultrametric triangle inequality, vertex 4