Pentominos https://www.mathematische-basteleien.de/pentominos.htm
Playings with Pentominos
15 Trip Y = 86 Trip Z = 131 Rings top You can make rings of pentominoes, build bridges
Playings with Pentominos
15 Trip Y = 86 Trip Z = 131 Rings top You can make rings of pentominoes, build bridges
Meine Sicht des Hyperboloids
Hyperboloids Richard Parris (Freeware-Programme) winplot Tim Tyler Hyperboloid bridges