| Press "t" to switch to a "Top" view.
Activate the "Rotate"
tool on the top toolbar and select the Z
"Axis Constraint"
to limit
rotation to the Z axis. Left-click the "Rectangle" to
select it,
if not selected already, and press the "Spacebar" to toggle
the
"Selection
Lock". Click and move the mouse anywhere in the viewport rotates the "Rectangle" to align with the arc as shown in the image. Rotation amount should be 40 - 45 degrees (approx). Once aligned press the "Spacebar" again to release the locked selection. |