11. Distorted regular skew apeirogons produce zig-zagging isogonal ones with translational symmetry. 12. The isogonal conjugates of the Fermat points are the isodynamic points and vice versa. 13. For example, the ( isogonal ) rectangle and ( isotoxal ) rhombus are duals. 14. Some of the isogonal triacontadigrams are depicted below as part of the aforementioned truncation sequences. 15. Such isogonal tilings are actually topologically identical to the uniform tilings, with different geometric proportions. 16. *The isogonal conjugate of the orthocenter of a triangle is the circumcenter of the triangle. 17. A polyhedron which is isohedral has a dual polyhedron that is vertex-transitive ( isogonal ). 18. A vertices ), and isogonal ( there is an isometry mapping any vertex onto any other ). 19. An "'isogonal polyhedron "'and 2D tiling has a single kind of vertex. 20. Regular polyhedra are isohedral ( face-transitive ), isogonal ( vertex-transitive ) and isotoxal.
