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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:72AS GHM

Order: 18

Horizontal side: 72 Vertical side: 72

Elements: 1, 3√2, 7, 5√2, 8, 10, 8√2, 10√2, 16, 20, 15√2, 16√2, 18√2, 20√2, 21√2, 36, 31√2, 36√2.

Code: 365 0 36 364 36 36 316 41 41 50 41 41 182 18 18 154 15 21 86 22 28 167 30 36 160 46 36 73 22 21 85 22 20 34 18 18 210 21 21 11 22 21 204 42 0 203 62 0 102 72 10 103 72 0

The properties below may precede order:side in a tiling's title:

Credit for Discovery

Just three people are credited with the discovery of Primitive Perfects:

Geoffrey H. Morley (GHM, England)

Jasper D. Skinner, II (JDS, United States)

William T. Tutte (WTT, Canada, 1917-2002) (15:44AI, 17:136AJ and 19:56AJ only)

36
36√2
31√2
5√2
18√2
15√2
8√2
16
16√2
7
8
3√2
21√2
1
20√2
20
10√2
10