You can find any tool by the Menu Structure HERE: https://turbocaddoc.atlassian.net/wiki/display/TC21UG/Menu+Structure
You can find the menu location of any tool by name HERE: https://turbocaddoc.atlassian.net/wiki/display/TC21UG/Tools+Mapped+to+Menus
Circle - Ellipse
Tools for drawing circles and ellipses.
You can display the Circle/Ellipse toolbar by right-clicking in any toolbar area and selecting Circle/Ellipse.