Part Modeling > Base Features > Revolve > Basics of the Revolve Feature > About the Angle of Revolution
  
About the Angle of Revolution
In a revolved feature, a section is revolved around an axis of revolution to a specified angle. You can define the angle of revolution by selecting one of the following angle options:
Variable—Revolves a section from the sketching plane by the specified angle value. Type the angle value in the box, or select one of the predefined angles (90, 180, 270, 360).
Symmetric—Revolves a section on each side of the sketching plane by half of the specified angle value.
To Selected—Revolves a section up to a selected datum point, vertex,  plane, or surface.
 
* The terminating plane or surface must contain the axis of revolution.
You can use snapping to the nearest reference to change the angle option.
To change the angle option from Variable to To Selected, hold down SHIFT while you drag the handle to a reference that will be used as the end of the feature.
To change the angle option from To Selected to Variable, hold down SHIFT while you drag the handle. While you drag, the angle dimension is displayed.