Curve of constant width

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Notion

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Science and technology

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What Wikipedia says

In geometry, a curve of constant width is a simple closed curve in the plane whose width (the distance between parallel supporting lines) is the same in all directions. The shape bounded by a curve of constant width is a body of constant width or an orbiform, the name given to these shapes by Leonhard Euler.

Excerpt from the Wikipedia article “Curve of constant width”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Sterilgutassistentin, GPL, via Wikimedia Commons.