
Similar features show up more often than you might think, some of them
long before Reuleaux analyzed them. In Chapter 13, we will see how Gothic
arches in medieval cathedrals relate to Reuleaux triangles, and con-
struct 3D printable outlines of cathedral window designs by using related
constructions.
OTHER REULEAUX POLYGONS
The 3D printed model provides both a Reuleaux shape of varying numbers of
sides (change the variable “sides” to an odd number) and an enclosure which
is approximately the shape they make when they are turned in place. Print
out several and turn the Reuleaux shape around to see! Here you can see
what a 5-gon (Figure 4-24), ...