Whenever I draw a circle in Sketchup it seems to be made up from 20 straight elements connected together. Can I increase the number of elements used to improve the accuracy of the circle?
From here:



Try the 90s rule... Create a circle by entering 1.0" and press return. Now type 90s & press return. You have created a circle with a diameter of 2", and told Sketchup you want 90 sides. This turns it into a complete circle. You should see the difference. Once you do this, all other circles will have 90 sides, within your current project, regardless of size. It has a memory. If you export into CAD, you will want to do this 90s with all circles. Otherwise, your CAD (BobCAD) program will likely not recognize it as a circle. This is important for any drill routines, as you will want to place a center dot inside each circle, to specify the drill's (geometry) center location(s). 


The "circle" is actually a polygon, and yes, you can specify a higher number of sides. You can type the number value (i.e., number of sides), immediately followed by the letter "s", as in 

