The pain is localized on the top of the foot, near the center of the foot, between the large toe and the one next to it. I thought I had broken something in the foot, but last week, my left foot had the same problem (pic enclosed).
The Triangle Inequality Theorem states that the sum of any 2 sides of a triangle must be greater than the measure of the third side. Note: This rule must be satisfied for all 3 conditions of the sides.
Another interesting right triangle is the 30-60-90 degree triangle. That is, the longest side is twice as long as the shortest side. It too is manufactured in plastic and widely used in design, drawing, and building applications. You can find an endless number of examples of right triangles.