Mathigon 23, cont. (PolyLine)
After recording the trace of one revolution to the spreadsheet, I created a list of points from those values and used the PolyLine function, to "connect the dots."
This is a cycloid in a circle - I don't know how to model that!
Thanks to Zbynek Konecny for his technical assistance and to Tim Brzezinski for his ideas about cycloids.
Here's a cycloid demo from an older applet:
Here's a link to some cycloid info: https://proofwiki.org/wiki/Length_of_Arc_of_Cycloid
And Tim's cycloid investigation: https://www.geogebra.org/m/fVPsKXfk
Algebra will have to wait!