Arc Definition

The different ways of defining an arc, called arc modes will, after selecting Insert > Arc, appear as a toolbar::

• ARC THROUGH THREE POINTS

• ARC, END POINTS + AMPLITUDE

• ARC, END POINTS + RADIUS

• ARC, POINT + RADIUS + TANGENT

• CIRCLE, CENTRE + RADIUS

• CIRCLE, CENTRE + POINT ON EDGE

• CIRCLE, TANGENT TO A LINE OR ARC + CENTRE

• CIRCLE, TANGENT TO TWO LINES + RADIUS

• CIRCLE, TANGENT TO THREE LINES

Since the initial system-proposed arc mode is always ‘EXISTING ARC’, this mode will not be included in the toolbar. Whenever the user is requested to supply an arc, the user can redefine the system-proposed arc mode just by selecting ‘ARC’ and choose one of these alternatives from the screen menu.