Image: Regular enneagon symmetries
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Description: Symmetries of a regular enneagon, with markups Reworked from "The Symmetries of Things", Chapter 20 The regular enneagon has Dih9 dihedral symmetry, order 18, and 5 lower dihedral and cyclic symmetries. The dihedral symmetries pass through vertices and edges. Cyclic symmetries in the middle column are labeled as g for their central gyration orders.
Title: Regular enneagon symmetries
Credit: Own work
Author: Tomruen
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