[EricH]

Originally Posted by Gary Dillard

From Q&A answers:

The rule states that the Robot may not have any two points more than 80 inches apart when measured horizontally. The parenthetical phrase is intended as a clarifying example, but it does not convey the same authority as the rule. It is recognized that a small set of configurations exist (with an equilateral triangle with 80 inch sides as the degenerate case) that are in compliance with the letter of the rule, but may violate the example. In all such cases the rule, and not the example, will be enforced.

Yes! No cylinder! (They have effectively declared a square, but your robot must fit in it in every orientation.)

(And Dave--if you read the edit--I did use the word "must" in the original.)