Whence 2/(3+√5) ?
In both the Woven SSD and the Woven GSD, you calculate the inset (from the points where the rods meet near their ends) for putting marks on the rods by multiplying their lengths by 2/(3+√5). Where does that strange-looking number come from? The key is that both figures consist of (regular) pentagrams, just interlocked in… [Read more]