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Move the corner of the rectangle. Can you work out what the purple number represents?

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Drawing Polygons

I wonder which polygons we can draw on dotty paper...

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Drawing Squares

Take a look at the video showing squares drawn on dotty grids...

An Appearing Act

Stage: 3 and 4

This resource is part of "Dotty Grids - Exploring Area"

You may wish to print out some dotty paper.


Take an 8 by 8 square, and cut it up like this:



Rearrange the pieces to make a 13 by 5 rectangle:




It seems we can use the same pieces to make two shapes with different areas!
Can you explain why?

Can you perform this “magic trick” by splitting squares of other sizes in a similar way?



Want to share what you've done? Got any interesting questions or ideas? 
Send us your thoughts.