Partial Ellipse
You can create a partial ellipse
(an elliptical arc) from a centerpoint, a start point, and an end point,
similar to creating a Centerpoint
Arc.
To create a partial ellipse:
-
In an open sketch, click Partial
Ellipse 
on the Sketch toolbar, or click Tools, Sketch Entities,
Partial Ellipse.
The pointer changes to 
.
Click in the graphics area to place the center
of the ellipse.
Drag and click to define one axis of the ellipse.
-
Drag and click to define the second axis.
The circumference guideline remains.
Drag the pointer around the circumference to define
the extent of the ellipse, then click to complete the ellipse.
To change the partial ellipse properties:
In an open sketch, select the ellipse
and edit its properties in the Ellipse PropertyManager.