Minimum given what constraints? A dime would have less area than a manhole cover.
Re: rolling puffy shapes
You guys are confusing rollers with wheels. With a roller, the object is supported at the top of the roller. With a wheel, the object is supported at the middle of the wheel (by the axis). It makes a big difference.
Some manhole covers in Manhattan are square; some are rectangular; some are round.
I have yet to see a trapazoid or a rhomboid, however.
This is shocking; they call this a city but our manhole cover inventory lacks a complete range of geometrical shapes.
This looks like it’s time for another long letter to the appropriate NYC commissioner.
Dear Sir or Madam;
I am outraged. You need to take action. …