 | This article includes a list of general references, but it lacks sufficient corresponding inline citations. (April 2011) |
| Regular heptagram (7/2) | |
|---|---|
 A regular heptagram | |
| Type | Regular star polygon |
| Edges and vertices | 7 |
| Schläfli symbol | {7/2} |
| Coxeter–Dynkin diagrams |      |
| Symmetry group | Dihedral (D7) |
| Internal angle (degrees) | ≈77.143° |
| Properties | star, cyclic, equilateral, isogonal, isotoxal |
| Dual polygon | self |
| Regular heptagram (7/3) | |
|---|---|
 A regular heptagram | |
| Type | Regular star polygon |
| Edges and vertices | 7 |
| Schläfli symbol | {7/3} |
| Coxeter–Dynkin diagrams |  |
| Symmetry group | Dihedral (D7) |
| Internal angle (degrees) | ≈25.714° |
| Properties | star, cyclic, equilateral, isogonal, isotoxal |
| Dual polygon | self |
| Star polygons |
|---|
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A heptagram, septagram, septegram or septogram is a seven-point star drawn with seven straight strokes.
The name heptagram combines a numeral prefix, hepta-, with the Greek suffix -gram. The -gram suffix derives from γραμμῆ (grammē) meaning a line.[1]