Geodesic
African dance rattle capsules from Benin, Nigeria and Congo: Plaiting a symmetric, hexahedral shape
Visual Mathematics, Tome 15 (2013) no. 1
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The following paper presents examples of dance rattles from several parts of Africa. The capsules of these rattles from Benin, Nigeria, and Congo are plaited in a similar way. They display a (rounded-off) hexahedral shape and each capsule is made from only one strip of a leaf. A plaited capsule can be represented in the plane as an alternating knot, precisely as a trefoil. The paper shows how to weave a strip of cardboard paper to produce the hexahedral shape.
Classification : 20H15 
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     author = {Paulus Gerdes},
     title = {African dance rattle capsules from {Benin,} {Nigeria} and {Congo:} {Plaiting} a symmetric, hexahedral shape},
     journal = {Visual Mathematics},
     year = {2013},
     volume = {15},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VM_2013_15_1_a1/}
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Paulus Gerdes. African dance rattle capsules from Benin, Nigeria and Congo: Plaiting a symmetric, hexahedral shape. Visual Mathematics, Tome 15 (2013) no. 1. http://geodesic.mathdoc.fr/item/VM_2013_15_1_a1/