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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:72AY GHM

Order: 18

Horizontal side: 72 Vertical side: 72

Elements: 1√2, 3√2, 6, 6√2, 7√2, 8√2, 12, 14, 16, 18, 14√2, 22, 28, 21√2, 30, 36, 42, 36√2.

Code: 425 0 30 364 36 36 363 72 36 74 43 29 80 50 36 221 72 36 305 0 0 214 21 9 183 42 12 12 43 29 167 42 28 283 58 0 142 72 14 143 72 0 36 21 9 67 24 12 66 24 6 127 30 12

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)

42
36√2
36
7√2
8√2
22
30
21√2
18
1√2
16
28
14√2
14
3√2
6
6√2
12