Great heptagram

The great heptagram, or ghag, is a polygon with 7 sides. Its created by taking the second stellation of a heptagram. A regular great heptagram has equal sides and equal angles.

It is one of two regular 7-sided star polygons, the other being the heptagram.

Vertex coordinates
Coordinates for a regular heptagram of edge length 2sin(3π/7), centered at the origin, are:


 * (1, 0),
 * (cos(2π/7), ±sin(2π/7)),
 * (cos(4π/7), ±sin(4π/7)),
 * (cos(6π/7), ±sin(6π/7)).