Auxiliary Circle and Arc Adding Functions (2D)
When adding an arc or a circle, you can select auxiliary functions from the additional menu.
 Circle
        tangential to line
 Circle
        tangential to line Circle tangential to line and center point
        line
 Circle tangential to line and center point
        line Circle tangential to two lines
 Circle tangential to two lines Circle with three points
 Circle with three points Circle tangential to three lines
 Circle tangential to three lines
