Epitrochoid

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Notion

Domain

Science and technology

In collections

Nobody has pulled it yet.

What Wikipedia says

In geometry, an epitrochoid ( or ) is a roulette traced by a point attached to a circle of radius r rolling around the outside of a fixed circle of radius R, where the point is at a distance d from the center of the exterior circle.

Excerpt from the Wikipedia article “Epitrochoid”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Sam Derbyshire at English Wikipedia, CC BY-SA 3.0, via Wikimedia Commons.