triangle_test, a FORTRAN77 code which calls triangle(), which can compute properties of a triangle, including angles, area, centroid, circumcircle, edge lengths, incircle, orientation, orthocenter, and quality.
The computer code and data files described and made available on this web page are distributed under the MIT license
triangle, a FORTRAN77 code which computes properties, including angles, area, centroid, circumcircle, edge lengths, incircle, orientation, orthocenter, and quality, of a triangle in 2D.