Icosihenagon

The icosihenagon is a polygon with 21 sides. A regular icosihenagon has equal sides and equal angles.

Stellations

 * 2-icosihenagram
 * 3-icosihenagram (compound of 3 heptagons)
 * 4-icosihenagram
 * 5-icosihenagram
 * 6-icosihenagram (compound of 3 heptagrams)
 * 7-icosihenagram (compound of 7 triangles)
 * 8-icosihenagram
 * 9-icosihenagram (compound of 3 great heptagrams)
 * 10-icosihenagram