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'Virtual Geoboard' printed from http://nrich.maths.org/
If Flash is no longer working for you, you might like to try the geoboards found here
There are many activities that make use of a pinboard or geoboard. By using the controls at the bottom of the interactivity you can change the number of points around the circle - or select a geoboard with a central pin - or create a square pinboard.
Click on the colour bands, then drag the band you create onto the board. To attach them you will need to pull them over the pegs. To change their position - or remove them - "loop" them off each peg in turn.
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If you would like to work on paper, the Printable Resources page
has links to printable sheets of circles with a range of numbers of circumferential dots.