Math Club: "The Shortest Distance is Along a Straight Line, Even When It's Not"

Professor John A. Frohliger, St. Norbert College Everyone knows that the shortest distance from point A to point B is along a straight line. But that's just if you're moving along a plane. What if you're moving from one top corner of an open box to the top corner on the opposite side? Or what if you're traveling from one side to a triangle to the other two sides and back? Bring a ruler and let's explore these and other similar questions.