page_title: Coinage shapes
section_title: Dodecagonal
hierarchical_section_title: Coinage shapes / Dodecagonal
caption_attribution_description: English: 20 Czech koruna (korun českých)
context_page_description: Although the vast majority of coins are round, coins are made in a variety of other shapes, including squares, diamonds, hexagons, heptagons, octagons, decagons, and dodecagons. They have also been struck with scalloped edges, and with holes in the middle. Coins in the shape of polygons often have rounded edges or are Reuleaux polygons.
  There is a list with more unusual shapes of non-circulating commemorative coins at the end of this page, that all have been issued officially by various countries.
context_section_description: Many countries have struck twelve-sided coins, mostly countries belonging to the Commonwealth of Nations. Several of these are 3 pence (or quarter shilling) coins from the pre-decimal pound.   Coins currently circulating include the British one pound coin , 50 cent coins from Australia , Fiji  and the Solomon Islands , the Tongan 50 seniti coin  and the circulating commemorative Croatian 25 kuna coins .
caption: The 20 koruna coin from the Czech Republic is tridecagonal.
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