Enneagram (geometry)


In geometry, an enneagram is a nine-pointed plane figure. It is sometimes called a nonagram or nonangle.
The name enneagram combines the numeral prefix, ', with the Greek suffix '. The -gram suffix derives from γραμμῆς meaning a line.

Regular enneagram

A regular enneagram is a 9-sided star polygon. It is constructed using the same points as the regular enneagon, but the points are connected in fixed steps. Two forms of regular enneagram exist:
There is also a star figure, or 3, made from the regular enneagon points but connected as a compound of three equilateral triangles. This star figure is sometimes known as the star of Goliath, after or 2, the star of David.
CompoundRegular starRegular
compound		Regular star

Complete graph K9

or 3

Other enneagram figures

The nine-pointed star or enneagram can also symbolize the nine gifts or fruits of the Holy Spirit.

In popular culture