Semicircle command needing three arguements
I am trying to use the Semicircle command from the input bar, and seem to be having trouble. I have two lists of points, l1 and l2, and try the command "Semicircle(l1(1),l2(1))" which is acccepted as input. However, when I check the Algebra view, I see that "Semicircle(l1(1),l2(1),space)" is created and undefined.
If I use the tool from the menu, and select the points using my mouse, everything is fine and the object created looks like "Semicircle(point1,point2)"
Any idea why the third agruement is created and filled with "space"?