Circle Arc > Radius - Object - Object (Draw Menu)

This command draws a circle arc which has a given radius and is tangent to two given lines (or Construction Aid lines) or circles (or Construction Aid circles).

If a circle arc is to be drawn while working in isometric or dimetric view, then the command Ellipse Arc > Vector - Vector must be used, because the result on the page is elliptical not circular.

After choosing this command, a dialog appears in which a radius for the circle arc can be entered.

Any part object in an existing object can be identified as the first reference object. This can be a side of a rectangle or a circle arc within a surface. Ellipses and ellipse parts can not be identified.

The identified object is referred to as the "Reference Object".

The position at which the object was identified (the "ID point") has no effect on the rest of the command. As there are up to eight possible results, it would be too complicated to make a choice on the basis of the ID point's position.

Any part object in an existing object can be identified as the second reference object. This can be a side of a rectangle or a circle arc within a surface. Ellipses and ellipse parts can not be identified.

The identified object is referred to as the "Reference Object".

After identifying both reference objects, all possible circle arcs are calculated (the graphic shows one possible set of results).

The desired circle arc can then be chosen with the help of a small dialog. Only one circle can be chosen at a time.

If the distance between the two objects is more than double the radius, or if two parallel lines are identified, it is not possible to calculate the circle arc.

The arc is assigned to the current layer. In addition, it contains a reference to the current pen.

The arc direction settings of existing arcs are not affected by changes to the current arc direction. To change the arc direction of an existing arc, use the command Transform Object to > Invert.