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