The routine xname returns the name of the x-axis used to define obj.  It returns either a name or FAIL.

The routine yname returns the name of the y-axis used to define obj.  It returns either a name or FAIL.

The routine zname returns the name of the z-axis used to define obj.  It returns either a name or FAIL.

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

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

$\mathrm{point}\left(A\,0\,0\,0\right),\mathrm{point}\left(B\,1\,1\,11\right),\mathrm{point}\left(C\,3\,7\,5\right)\:$

$\mathrm{plane}\left(p\,\left[A\,B\,C\right]\right)$

$p$

$\mathrm{detail}\left(p\right)$

$\begin{array}{ll}\text{name of the object}& p\\ \text{form of the object}& \mathrm{plane3d}\\ \text{equation of the plane}& -72\mathrm{\_x}+28\mathrm{\_y}+4\mathrm{\_z}=0\end{array}$

$\mathrm{xname}\left(p\right)$

$\mathrm{FAIL}$

$\mathrm{Equation}\left(p\right)$

$-72a+28b+4c=0$

$\mathrm{xname}\left(p\right)\;$$\mathrm{yname}\left(p\right)\;$$\mathrm{zname}\left(p\right)$

$a$

$b$

$c$

$\mathrm{detail}\left(p\right)$

$\begin{array}{ll}\text{name of the object}& p\\ \text{form of the object}& \mathrm{plane3d}\\ \text{equation of the plane}& -72a+28b+4c=0\end{array}$