page_title: Heptagon
section_title: Symmetry
hierarchical_section_title: Heptagon / Regular heptagon / Symmetry
caption_attribution_description: English: en:heptagon symmetry
context_page_description: In geometry, a heptagon is a seven-sided polygon or 7-gon.
  The heptagon is sometimes referred to as the septagon, using "sept-" together with the Greek suffix "-agon" meaning angle.
context_section_description: The regular heptagon belongs to the D₇ₕ point group (Schoenflies notation), order 28. The symmetry elements are: a 7-fold proper rotation axis C₇, a 7-fold improper rotation axis,S₇, 7 vertical mirror planes, σᵥ, 7 2-fold rotation axes, C₂, in the plane of the heptagon and a horizontal mirror plane, σₕ, also in the heptagon's plane.
caption: Symmetries of a regular heptagon. Vertices are colored by their symmetry positions. Blue mirror lines are drawn through vertices and edges. Gyration orders are given in the center.[5]
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