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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:30AB GHM

Order: 18

Horizontal side: 30 Vertical side: 30

Elements: 1√2, 2, 2√2, 3, 4, 3√2, 4√2, 6, 7, 8, 6√2, 7√2, 11, 8√2, 12, 15, 18, 15√2.

Code: 187 0 30 80 18 30 81 26 30 42 30 26 41 30 30 113 30 15 16 9 21 27 10 22 26 10 20 75 12 15 74 19 15 30 9 21 60 6 18 61 12 18 37 12 15 150 15 15 151 30 15 127 0 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)

18
8√2
8
4√2
4
11
1√2
2
2√2
7
7√2
3√2
6√2
6
3
15√2
15
12