Which construction requires drawing only one arc with a compass?

If we have to construct any thing like perpendicular bisector, angle bisector, any angle. For example the primary angle constructed in a 60° angle. But even to construct a 60° angle we need to construct two arcs.

Rest of all the constructions need at least 2 arcs to be constructed.

The only construction that can be done by only one arc is constructing a circle.