Drawing donuts in AutoCAD LT might not be as fun as doing donuts in a parking lot, but it’s a lot easier. (Unless your parking lot is covered in ice as they often are in the winter…then AutoCAD donuts are just safer.) And they might not taste as good as the once you get from the corner bakery, but they won’t leave powdered sugar on your drawings either. You’ll find the Donut command on the expanded portion of the Draw tab. What is a donut? Just a closed polyline, usually with a non-zero width, consisting of two arcs joined end to end. You define a donut by first entering its inside diameter, then the outside. Once you’ve plugged in those numbers, you can click to create as many donuts as you like before exiting the command. If you select one of your newly created donuts and check out its properties, you’ll see that the width is equal to your outside diameter minus the inside diameter divided by 2 (W = (OD-ID)/2), and the radius of the arc is equal to the half the inside diameter plus half the width (R = (ID+W)/2). That’s because polylines are defined by their centerlines, not their edges, so AutoCAD LT has to do some math behind the scenes to generate the donut. You can use the Donut command to generate closed filled circles, too – just enter 0 for the inside diameter. On the right are some donuts of varying sizes (although sadly, none are custard-filled).

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