8796 /www/nrich/html/content/id/8796/ 6 2011-02-01T00:00:01 <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0"><br></br> 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.<br></br> 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.<br></br> <br></br> <a href="/content/id/8796/circleAngles.swf">Full Screen Version</a><br></br> <mdo:flash height="400" id="/content/id/8796//content/id/8796/circleAngles.swf" width="550"><param name="allowfullscreen" value="true"></param><param name="allowfullscreen" value="true"></param> <param name="movie" value="/content/id/2883/circleAngles.swf"></param> <param name="flashplayerversion" value="7"></param> <param name="height" value="400"></param> <param name="width" value="550"></param> </mdo:flash><br></br> <br></br> If you would like to work on paper, the <a href="http://nrich.maths.org/public/viewer.php?obj_id=6676&amp;part=index">Printable Resources page</a> has links to printable sheets of circles with a range of numbers of circumferential dots.<br></br></mdoxml> 2 3 1 0 0 0 0 A virtual geoboard that allows you to create shapes by stretching rubber bands between pegs on the board. Allows a variable number of pegs and variable grid geometry and includes a point labeller. 2D Geometry, Shape and Space Circle theorems