06. More ideas

Using rubber bands

Indentations are placed around the outside of the circle frame in which rubber bands can be attached. These indentations are positioned at every 10 degrees seen from the centre of the circle. Slightly wider indents make the positions for 0, 30, 45, 60, 90 degrees, etc. easily recognizable.
When spanning to opposing indentations with a rubber band, they meet the centre, forming also the diameter of the circle.
It also exactly coincides with the degree indications along the circle.

Photo: The compass foot on the edge of the circle frame. The compass scratcher set at 10 centimetres

The compass and the circle frame / circles in a circle

The indents at the edge of the circle frame have the same diameter as the needle of the compass.
Place the compass foot partly on the edge so the needle of the compass fits in indentation of the circle frame. Set the desired radius for the circle to be drawn.
The set radius for the circle determines the length of the curve that can be created.

Fantasy

As an example set the radius at 10 centimetres. Place the compass at 12 o’clock and draw the maximum possible curve. Place the base at 3, 6 and 9 o’clock respectively and create the curves as well.
The curves will cross in the middle of the circle.
Finally trace the circle’s contour and remove the circle frame.