Stage: 2 Challenge Level: 
What shaped overlaps can you make with two same-sized circles?
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What shapes are 'left over'?
What shapes can you make when the circles are different sizes?
What happens when you use more than two circles?
Tangram. Circles. Compound transformations. Interactivities. Other polygons. Practical Activity. Visualising. Working systematically. Addition & subtraction. Games.
Published February 2004.
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