Making Maths: Equilateral Triangle Folding

Here's an easy way to fold any rectangle of paper into a triangle with three sides the same length.

1. Fold the paper in half long-ways, then open it out flat.
   
   
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2. Fold a bottom corner up to touch the fold line, making a sharp point on the other corner.
   
   
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3. Now fold the two RED edges together.
   
   
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4. Fold under the corner and then tuck it in out of the way. Turn over to the smooth side.
   
   
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5. Now why not make some more from coloured paper and create some designs.