Go backward to Mark objects
Go up to Object types
Go forward to Bitmaps
Circular arcs
Circular arcs can be entered by clicking three points on the arc or by
clicking the center of the supporting circle as well as the begin and
end vertex of the arc. They can be filled in Postscript fashion, and can
have arrows.
A common application for arcs is to mark angles in drawings. The
snap keys are useful to create such arcs: set arc creation to
center & 2 pts, select snap to vertex and snap
to boundary, click first on the center point of the angle (which is
magnetic) and click then on the two bounding lines.