Measuring an Angle
To measure an angle in a 2D or a 3D viewer:
Click Measure on the menu bar.
Click Angle 
.
Click a first, second and third point.
Note
Right-click or click outside the workspace to cancel.
The angle measurement is shown in the viewer and added to the SmartPanel Annotation tab 
. To edit the angle measurement, drag the control points. The value is updated accordingly.