Heptagon and Heptagrams / Septegram.
Proposed Problem 63: Heptagon Regular, Side and Diagonals.
Geometric Art of Problem 63: Regular Heptagon.
Geometric Art: Heptagon Kaleidoscope, Circular and Triangular Composition, iPad Apps, Mobile.
Word Cloud of the Regular Heptagon.
Origami: How to make a Heptagon from a circle. Origami: The sequenced crease pattern for making the heptagon.
Euclid's Elements Book I, 23 Definitions. One-page visual illustration. Euclid's Elements Book. Index
Geometry Online Glossary . Geometry Glossary based on the new New York State mathematics standards initiative.