Rotating Sketch Entities in Solidworks

To rotate sketch entities:
In sketch mode click Rotate Entities  Tool_Rotate_Entities_Sketch.gif (Sketch toolbar) or Tools > Sketch Tools > Rotate.
In the PropertyManager, under Entities to Rotate:
Select sketch entities for Sketch item or annotations.
Select Keep relations to maintain relations between sketch entities. When cleared, relations are broken only between selected entities and those that are not selected; relations among the selected entities are maintained.
Under Parameters:
Sketch Type Instructions for modifying parameters
2D Sketch
3D Sketch On Plane
Click Base Point (Rotate Point Defined) to set a Base point Base_point_Move_Copy.gif, and then click in the graphics area to set the Center of rotation.
Set a value for Angle PM_angle.gif.
3D Sketch To rotate the entities using the 3D triad, select a ring and drag.
sketch_3D_rotate.gif

source: http://help.solidworks.com/2013/English/solidworks/sldworks/t_rotating_sketch_entities.htm