Heptagram


A heptagram, septagram, septegram or is a seven-point star drawn with seven straight strokes.
The name heptagram combines a numeral prefix, hepta-, with the Greek suffix . The -gram suffix derives from γραμμῆ meaning a line.

Geometry

In general, a heptagram is any self-intersecting heptagon.
There are two regular heptagrams, labeled as and, with the second number representing the vertex interval step from a regular heptagon,.
This is the smallest star polygon that can be drawn in two forms, as irreducible fractions. The two heptagrams are sometimes called the heptagram and the great heptagram.
The previous one, the regular hexagram, is a compound of two triangles. The smallest star polygon is the pentagram.
The next one is the octagram and its related star figure, followed by the regular enneagram, which also has two forms: and, as well as one compound of three triangles.



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7-2 prism

7-3 prism

Complete graph

7-2 antiprism

7-3 antiprism

7-4 antiprism

Uses

Flags and heraldry

Religious and occult symbolism