Open Ring

Create an open ring to be used either as a primitive or as a building block for constructing complex geometry.

On the Construct tab, in the Create Surface group, click the  Complex Surfaces icon. From the  Rings drop-down list, select  Open Ring.

	Centre point (C)	The centre point of the ring.
	Outer radius (R)	The outer radius of the ring.
	Inner radius (r)	The inner radius of the ring.
	Start angle ( $\phi$ )	The start angle of the ring.
	Gap angle ( $\theta$ )	The gap angle of the ring.