Plastic ratio: The lesser-known cousin of the golden ratio, and the only real solution of x³=x+1.
— Martin Holtham (@GHSMaths) March 31, 2020
Plastic spiral: Equilateral triangles with side lengths in this ratio form a closed spiral.https://t.co/nmvpbnpImV#mathart pic.twitter.com/asL2s2JqOT