Comment 1 for bug 1333523

Proposed addition to the circle documentation:

"
To create a circle from its center and radius, you need a point and a value. The value must exist prior to the circle. It can be any sort of value: a computed one like a distance or a free value you edit. You create a free value from the "Numerics" tool (ref. to http://drgeo.olympe.in/doc/en/drgeo004.html#@default34)
"