This applet has limited applicability. The fact that the angles are measured from vertical may cause some initial confusion for students. Showing the angles (as when the "Parallelogram of Forces" box is checked) would be helpful.
It is possible to choose forces that satisfy the advertised constraints, e.g.
(8,3,6), with a solution, yet the applet fails to compute the result.
Only integer values of weights are allowed, which limits the usefulness of the