The routine volume returns the volume of the input object which is a sphere, a regular polyhedron, a general tetrahedron, or a parallelepiped.

The command with(geom3d,volume) allows the use of the abbreviated form of this command.

$\mathrm{with}\left(\mathrm{geom3d}\right)\:$

$\mathrm{cube}\left(c\,\mathrm{point}\left(o\,0\,0\,0\right)\,1\right)$

$c$

$\mathrm{volume}\left(c\right)$

$\frac{8\sqrt{3}}{9}$