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 - Center and Point
Creates a circle by defining its center and a point on its circumference.
- Select the circle centerpoint. Move the cursor to size the circle.
- Click to create the circle, or enter the radius, diameter, or circumference in the Inspector Bar.