Thatababy by Paul Trap for July 27, 2019

What will he doodle in either a square or cube?

Totally!

Mmm, a skating rink is more oval. But I’d skate on a round one. Might keep the hockey players away.

I don’t see your angle here

just seeing the word ‘tubular’ got me thinking about Mike Oldfield’s classic seventies album

here is the whole enchilada

https://www.youtube.com/watch?v=bv_4sZCLlr0

Geometry lesson from Thatababy!

tubular makes sense for surfers since they can be inside a huge tube of water. not so much on the outside.

Dr Pedanto, here.

A trapeze would be more appropriate with a trapezoid (a quadrilateral with two parallel sides), being from the Greek word for “table”, τράπεζα (trápeza) literally “having three feet”: archaic Greek tables were quadrilateral but narrower at the single-leg end, for stability.

And why three feet? A piece of furniture with three feet, e.g. a stool, is stable on any irregular surface, since any three points define a plane and three points are therefore automatically always in the same plane.

And why are trapezes so called? Because for (vitally necessary) stability, the anchors are a bit farther apart than the length of the bar.

Etymology is so cool. (Discussion of how you get “three” from Greek τρα- is for another time.)