Negehoek
'n Negehoek of nonagoon is 'n reëlmatige veelhoek met nege hoeke, van 140 grade altesame, met nege sye
Bronne
- J. L. Berggren, "Episodes in the Mathematics of Medieval Islam", bladsy 82 - 85 Springer-Verlag New York, Inc. Eerste uitgawe 1986
- John H. Conway, Heidi Burgiel, Chaim Goodman-Strauss, (2008) The Symmetries of Things, ISBN 978-1-56881-220-5 (Hoofstuk 20, Generalized Schaefli symbols, Types of symmetry of a polygon, bladsye 275-278)
- TMBW.net
Sien ook
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