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From: AutoCAD Productivity Articles #112
Originally published: April 2012

Add an Arc to a Polyline

by Michael Beall

AutoCAD 2011 introduced the 'multi-function' grip; a concept that was applied to the standard square grip, as well as the dot-grip for hatches, and the rectangular multi-function grip located at the mid-point of polylines. Now when you hover in any type of grip, you get a shortcut menu.


Let's say you have drawn a polyline around a room so you can calculate the area, but the polyline went straight through a circular column… and now you want to make the polyline follow the arc of the column.

How to Add an Arc to a Polyline

  1. Add VertexSelect the polyline to display the grips.

  2. Hover in the multi-function grip at the midpoint, then click Add Vertex.

  3. IntersectionUse Intersection snap and add a vertex at one of the polyline/circle intersections. Repeat the process for the other side of the circle so you now have a vertex on both sides of the circle.

    Quick selection of object snapsNote: To quickly access the Intersection snap, use Shift + Right-click to open the object snap shortcut menu, then click Intersection. I typically set my Osnap to Endpoint and Node, then use this method if I need any other object snap for a single shot.

  4. Click the polyline again, hover in the grip in the middle of the circle, then click Convert to Arc.

  5. NearestUse Shift + Right-click, then the Nearest option and click on the circle to complete the process!

The result is an arc segment within your polyline.


See all the articles published in April 2012

See this article in the April 2012 Corner

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