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Exploring Diagonals

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...

Send Us Your Thoughts

This is the place to share how you got started on the problem, and any conclusions you have reached.

You can also share any questions you've come up with, and any progress you've made answering those questions.

You can upload pictures, documents or spreadsheets - whatever you like, as long as the file is less than 2MB.

You might also want to send a link to a video or picture you've uploaded somewhere else on the web. Please explain a little about what you have done, so we can share it with other students. 

It would also be nice to share a little information about everyone who contributes, so please feel welcome to include your name, age, school and country.