Heptagram

Regular heptagram (7/2)
A regular heptagram
TypeRegular star polygon
Edges and vertices7
Schläfli symbol{7/2}
Coxeter–Dynkin diagrams
Symmetry groupDihedral (D7)
Internal angle (degrees)≈77.143°
Propertiesstar, cyclic, equilateral, isogonal, isotoxal
Dual polygonself
Regular heptagram (7/3)
A regular heptagram
TypeRegular star polygon
Edges and vertices7
Schläfli symbol{7/3}
Coxeter–Dynkin diagrams
Symmetry groupDihedral (D7)
Internal angle (degrees)≈25.714°
Propertiesstar, cyclic, equilateral, isogonal, isotoxal
Dual polygonself

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]

  1. ^ γραμμή, Henry George Liddell, Robert Scott, A Greek-English Lexicon, on Perseus