Spinostellated tetradecagon

The spinostellated tetradecagon or nisted is a polygon compound composed of two great heptagrams. As such it has 14 edges and 14 vertices.

It is the fifth stellation of the tetradecagon.

Its quotient prismatic equivalent is the great heptagrammic antiprism, which is three-dimensional.

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


 * $$\left(\pm1,\,0\right),$$
 * $$\left(\pm\cos\frac{\pi}{7},\,\pm\sin\frac{\pi}{7}\right),$$
 * $$\left(\pm\cos\frac{2\pi}{7},\,\pm\sin\frac{2\pi}{7}\right),$$
 * $$\left(\pm\cos\frac{3\pi}{7},\,\pm\sin\frac{3\pi}{7}\right).$$