Use to add angular dimensions.
You can select a Dimension Style, which controls how the dimension is drawn, as well as override the Text of the dimension. By default %s will render the standard dimension length. But you can augment or completely replace the text of the dimension.
If Selecting Geometry, PrimeCut will expect you to select two non parallel line segments, and subsequently indicate with the mouse wherte the dimension text is to be placed.
If Selecting Points, 3 points are expected. Select the center of the angle first, then the two "leg" points.
See also