Stage: 2 Challenge Level: 
Quadrilaterals are shapes that have four straight sides.
How many DIFFERENT quadrilaterals can be made by joining the dots on the circle? (There are eight evenly-spaced dots.)
Can you work out the angles of all your quadrilaterals?
For a printable set of dotted circles to use with this resource click here.
Investigations. Working systematically. Interactivities. Addition & subtraction. Practical Activity. Quadrilaterals. Pinboard/geoboard. Visualising. Compound transformations. Combinations.
Published September 1999,October 2008.
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