Constant width for MBorcherds
I am a student, too. Let's go to recess, ok? These questions and tasks are for the Math People.
I say, Mr Borcherds' worksheet http://www.geogebratube.org/material/show/id/3597, alas, is not a shape of constant width.
Proof: drag the given points.
The only purpose I have for finding errors is to fix them. So let me try my hand at a solution: