Category : Science Projects And Inventions
Cut a one inch (2.5 cm) strip from the side of a typewriter paper. Study Figure 2 and tie an overhand knot in the centre of the strip. Pull the knotted strip taut and then flatten it.
As in Figure 2, fold end A over the knot.
If you hold the knot up to a light what you will notice is a perfect five-pointed star in a regular pentagon. There are many amazing mathematical properties in it.
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