2012

You can determine the angle between the two sides of a triangle using the
ang function, as shown in the following example:
Command: cal
>> Expression: ang(end,end,end)
Select the apex of the angle, and then select the two opposite vertices.
See also:
Use the Command Line Calculator
Calculate a Normal Vector
The nor function calculates the unit normal vector (a vector perpendicular
to a line or plane), not a point. The vector defines the direction of the normal,
Commands | 179