## Chord Quadrangle 3-3

### Info

A member of an infinite family of substitution rules for similar quadrangles possessing two right interior angles at opposite vertices.
A big copy of such a quadrangle can be divided into (smaller) similar quadrangles in several ways. Some of them are compatible with a substitution rule. This sone is the smallest possibility, using three [prototiles] (

### Substitution Rule

### Patch