Any two of lines, segments, vectors or polygon sides can be constrained with an angle value or variable name with these steps:
| 1. | Select  two from the line types listed above. |
| 2. | Click the Angle icon  . |
| 3. | Enter the constraint, real or symbolic. If you enter a real value, the lines will be adjusted to reflect the constraint. |
Note: The angular units are displayed in the lower right of the screen. Change the default (Degrees or Radians) in the Edit / Settings menu.