1.Let's make a tetrahedron from reed.

A tetrahedron has   ...... facets ,....... sides and ....... tops.

Take : 6 reeds ( same long) , a needle ,some thread and scissors.

Look at the picture and try to do it.

 3-4-13-3.jpg (23532 bytes)
     
    

2. Let's make an octahedron.

An  octahedron has ...............facets
...................sides and ................tops.


You need  12 same long reeds, a needle ,some thread and scissors.
 3-4-13-4.jpg (22252 bytes)

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