# Rounded Polygons

**URL:** <https://boards.straightdope.com/t/rounded-polygons/265690>\
**Category:** Factual Questions\
**Created:** [September 23, 2004, 3:50pm UTC](https://boards.straightdope.com/t/rounded-polygons/265690 "2004-09-23T15:50:26Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![brane\_damaj](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@brane\_damaj](https://boards.straightdope.com/u/brane_damaj)\
**Post date:** [September 23, 2004, 3:50pm UTC](https://boards.straightdope.com/t/rounded-polygons/265690/1 "2004-09-23T15:50:26Z")

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Is there a cool technical name for a polygon with rounded corners?

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**Author:** ![Bytegeist](https://avatars.discourse-cdn.com/v4/letter/b/9dc877/32.png) [@Bytegeist](https://boards.straightdope.com/u/Bytegeist)\
**Post date:** [September 23, 2004, 4:11pm UTC](https://boards.straightdope.com/t/rounded-polygons/265690/2 "2004-09-23T16:11:52Z")

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_Rolygons_?

Probably not an official term though, because I just now made it up.

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**Author:** ![Colophon](https://avatars.discourse-cdn.com/v4/letter/c/f05b48/32.png) [@Colophon](https://boards.straightdope.com/u/Colophon)\
**Post date:** [September 23, 2004, 4:32pm UTC](https://boards.straightdope.com/t/rounded-polygons/265690/3 "2004-09-23T16:32:03Z")

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Do you mean like the British [50p piece](http://www.natch.co.uk/Stuff/OTDiH/OTDiHOct/Oct08-15/50pPiece.jpg)?

If so it’s a “curvilinear polygon”, I believe. [Cite](http://www.tutorgig.com/encyclopedia/getdefn.jsp?keywords=heptagon).The coin is a constant diameter, so it will still work in vending machines etc.