triangle_properties, a MATLAB code which can compute properties, including angles, area, centroid, circumcircle, edge lengths, incircle, orientation, orthocenter, and quality, of a triangle in 2D.

These properties include:


The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.


triangle_properties is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs:

geometry, a MATLAB code which performs geometric calculations in 2, 3 and n dimensional space.

hypersphere_properties, a MATLAB code which carries out various operations for an m-dimensional hypersphere, including converting between cartesian and spherical coordinates, stereographic projection, sampling the surface of the sphere, and computing the surface area and volume.

polygon_properties, a MATLAB code which computes properties of an arbitrary polygon in the plane, defined by a sequence of vertices, including interior angles, area, centroid, containment of a point, convexity, diameter, distance to a point, inradius, lattice area, nearest point in set, outradius, uniform sampling.

tetrahedron_properties, a MATLAB code which computes properties of a given tetrahedron.

triangle_analyze, a MATLAB code which reads a triangle from a file, and then reports various properties.

triangle_interpolate, a MATLAB code which shows how vertex data can be interpolated at any point in the interior of a triangle.


triangles, a dataset directory which contains examples of triangles;

Source Code:

Last revised on 12 January 2021.