Pythagoras Theorem
Use the GeoGebra Activity below to investigate the areas of the squares on the sides of right angled triangles.
The two orange points N and B can be selected and dragged along the lines they are on.
What happens to the areas of the squares if you change one of the side lengths?
How are the three areas related? Is this always the case?
You can use the arrow keys on your keyboard to move the activity to the centre, and right click to zoom out.
The two orange points N and B can be selected and dragged along the lines they are on.
What happens to the areas of the squares if you change one of the side lengths?
How are the three areas related? Is this always the case?
You can use the arrow keys on your keyboard to move the activity to the centre, and right click to zoom out.
Created with GeoGebra 
What you have discovered above is a very old rule in mathematics, known to all ancient civilisations (including the Greeks, Chinese, Egyptian and Babylonians).
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