spherical triangle(n = noun.shape) - a spherical polygon formed by the arcs of 3 great circles;
is a kind of spherical polygon

acute triangle, acute-angled triangle, bermuda triangle, equiangular triangle, equilateral triangle, isosceles triangle, oblique triangle, obtuse triangle, obtuse-angled triangle, right triangle, right-angled triangle, scalene triangle, southern triangle, spherical, spherical aberration, spherical angle, spherical geometry, spherical polygon, spherical trigonometry, triangle