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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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Exploring Area

I wonder what we can find out about the areas of polygons drawn on dotty grids...

Drawing Squares

Stage: 3 and 4

For ideas on how this problem and others from the Dotty Grids Collections can be used in the classroom, you may be interested to read this article.

A printable version of this problem is available as a Word or Pdf file.

For consideration: Matt and Emmy Videos

Version 1

Version 2
(The second speech bubble is missing the word 'dots?') 

Version 3