Talk:Epitrochoid

Pronunciation
Epitrochoid. How is this word pronounced?
 * Eppi-TRO-koid

Smooth rolling?
If the outer circle is not required to roll smoothly around the outer circle, is the curve still an Epitrochoid? If not, what would the more general curve be called? —Preceding unsigned comment added by 206.53.197.12 (talk) 02:30, 4 November 2007 (UTC)

d = 1/2?
It seems to me that d = r = 1 in the animated example, and not d = 1/2. 195.49.41.8 (talk) 07:36, 21 September 2009 (UTC)
 * R = 3, r = 1 and d = 1/2 looks fine to me (both from the 2009 version and the current one). Klbrain (talk) 12:10, 26 April 2024 (UTC)

Proposed merge of Cyclocycloid into Epitrochoid
Neither page gives an indication of why they are different. They even use the same animation! AriTheHorseTalk to me! 17:04, 8 February 2024 (UTC)


 * A cyclocycloid is either an epitrochoid or a hypotrochoid. 2601:4B:C080:72C:74BF:2D79:63F4:59FB (talk) 05:37, 17 April 2024 (UTC)
 * I've added some text on the cyclocycloid page to hopefully make the distinction clearer; perhaps just clarifying the distinction is sufficient rather than merging. Klbrain (talk) 12:20, 26 April 2024 (UTC)