Function A = triarea(a,b,c) returns the area of a triangle, described by the three vertices a, b and c. Matrices a, b and c have 3 columns which contain the x,y,z coordinates, respectively. The operation is done per corresponding row in a, b and c. The validity of the input is not checked! (c) 2026 fabien van mook 2026.08.20 release of this file within package "fvm-geometry" under GNU GPLv3+