How to prove that there can only be five Platonic solids

A one-minute video on how to prove there are only five Platonic solids. In a Platonic solid every face is the same regular polygon: a triangle, square or pentagon. You can’t make a corner from regular hexagons as three together make a flat sheet.

How to prove that there can only be five Platonic solids slideshow

An image of five nets to make 3D shapes

Click to see a step-by-step slideshow.

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