Pack equal coins so each touches 6 neighbors. Surprisingly, any convex shape can (probably) too if copies are rotated 120°. I spotted this playing with my son’s blocks, then found it in Grünbaum & Shephard’s Tilings & Patterns (EPP21-4, Statement 7.5.6). https://www.shadertoy.com/view/Wct3DH
#geometry #tilings #packings
#geometry #tilings #packings

