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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...

Coordinates of Corners

Stage: 3 and 4


Move the dots below to make some squares. Can you make a variety of squares whose sides are not parallel to the axes?




If you have a set of four coordinates, is there a quick way to decide (without drawing) whether they form a square?

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