Angle
You assign Angle constraints to pairs of linear elements. At solve time, the relative angle between the elements in each angle-constrained pair is adjusted as needed to match the angle specified by the constraint. If this angle cannot be achieved due to other constraints, the solve fails.
To assign an angle constraint:
1. Click Parametric and then, in the Create group, click 
Constraints.
Constraints.The Generate Constraints dialog box opens.
2. In the Action area, click Assign.
3. In the Type box, select Angle.
4. Click Apply.
5. Click the two linear elements to be constrained.
6. Choose the angle for the constraint by any of the following methods:
◦ Click 
OK or select another angle pair. The constraint value is set to the actual angle between the lines at solve time, thus maintaining this angle in the variation.
OK or select another angle pair. The constraint value is set to the actual angle between the lines at solve time, thus maintaining this angle in the variation.◦ Type a specific angle value in the user input line and press ENTER. The elements will be adjusted to this angle.
◦ Type a parameter name or a Creo Elements/Direct Drafting expression that defines the angle (string input). The value returned in the parameter or the result of the expression is used to adjust the angle.
Each element in an angle-constrained pair is labeled with an angle icon, , and a reference number that is unique to the pair. If the constraint is set to a specific value or parameter name, that information is appended to the icon.