There are several ways of creating an Angular dimension by specifying two lines.
If the two lines intersect, PowerShape finds their intersection to determine the angle (even if PowerShape has to extend the lines to find their intersection).
Select a line and then click a position to set the end point of a second line . The end point of the first line nearest to where you clicked to select it becomes the end point of the second line .
For example, selecting this line nearest its left end point results in:
Selecting the same line nearest its right end point results in:
You can specify two lines by clicking three positions. The first line is between click and click . The second line is between click and click .
If you select an arc, the two lines are specified from the arc centre: