Chiral enneagonal symmetry

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Chiral enneagonal symmetry
Rank2
SpaceSpherical
Order9

Chiral enneagonal symmetry, also known as kiennic symmetry and notated as I2(9)+, is a 2D spherical symmetry group. It is the symmetry group of the enneagon with rotational symmetry but no reflections.

Subgroups[edit | edit source]

Convex polytopes with I2(9)+ symmetry[edit | edit source]