302.- BASEBALL...UDOS

[finalizados los períodos de vacaciones y fanatismo ajadrecístico, nos reintegramos a la actividad matemática normal]

Este es el famoso diamante donde se juega al beisbol, un cuadrado (con lo cual cada esquina tiene un ángulo de 90 grados)




El pentágono marcado con una D está bien determinado: Home base shall be marked by a five sided slab of whitened rubber. It shall be a 17 inch square with two of the corners removed so that one edge is 17 inches long, two adjacent sides are 8 1/2 inches and the remaining two sides are 12 inches and set at an angle to make a point. It shall be set in the ground with the point at the intersection of the lines extending from home base to first base and to third base; with the 17 inch edge facing the pitcher's plate, and the two 12 inch edges coinciding with the first and third base lines.

Pero... ¿12² + 12² =17²?

Pitágoras se revuelve en su tumba...