Approx. to Arcs and Lines 
Access: Open this function from the following location:
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Select Wireframe > Modify Curves > Approx. to Arcs & Lines from the menu bar.
Approximate a spline(s), an ellipse edge(s), or a composite curve(s) to primitives curves such as arcs and lines.
This function is particularly useful when using the WireEDM application because, in many cases, only primitive curves can be used as input.
General Interaction
The following image shows the Feature Guide for Approx. to Arcs/Lines.
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Tip: You can open the Feature Guide at any time by right-clicking the mouse in the graphic display area.Required Step 1 
: Pick one or more splines, an ellipse edges, or a composite curves to be approximated into arcs or lines.
Required Step 2 
: Set the parameters.
Detailed Interaction
See Options and Results.
