Editing Heptagon (section)

==Empirical examples ==
{{multiple image
|image1=Geometry problem-Sb 13088-IMG 0593-white.jpg
|caption1=Heptagon divided into triangles, clay tablet from [[Susa]], 2nd millennium BCE
|image2=Fürstenmausoleum Stadthagen 10 Kuppel.JPG
|caption2=Heptagonal dome of the [[Mausoleum of Prince Ernst]]
|width1=220|width2=300}}
The United Kingdom, since 1982, has two heptagonal [[coin]]s, the [[Fifty pence (British coin)|50p]] and [[Twenty pence (British coin)|20p]] pieces. The [[Barbados Dollar]] are also heptagonal. Strictly, the shape of the coins is a [[Reuleaux polygon|Reuleaux heptagon]], a [[Curvilinear coordinates|curvilinear]] heptagon which has [[Curve of constant width|curves of constant width]]; the sides are curved outwards to allow the coins to roll smoothly when they are inserted into a [[vending machine]]. [[Botswana pula]] coins in the denominations of 2 Pula, 1 Pula, 50 Thebe and 5 Thebe are also shaped as equilateral-curve heptagons. Coins in the shape of Reuleaux heptagons are also in circulation in Mauritius, U.A.E., Tanzania, Samoa, Papua New Guinea, São Tomé and Príncipe, Haiti, Jamaica, Liberia, Ghana, the Gambia, Jordan, Jersey, Guernsey, Isle of Man, Gibraltar, Guyana, Solomon Islands, Falkland Islands and Saint Helena. The 1000 [[Zambian Kwacha|Kwacha]] coin of Zambia is a true heptagon.

The [[Brazil]]ian 25-cent coin has a heptagon inscribed in the coin's disk. Some old versions of the [[Coat of arms of Georgia (country)|coat of arms of Georgia]], including in [[Georgian Soviet Socialist Republic|Soviet days]], used a {7/2} heptagram as an element.

A number of coins, including the [[20 euro cent coin]], have heptagonal symmetry in a shape called the [[Spanish flower]].

In architecture, heptagonal floor plans are very rare. A remarkable example is the [[Mausoleum of Prince Ernst]] in [[Stadthagen]], [[Germany]].

Many police badges in the US have a {7/2} heptagram outline.