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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:54AB4of4 GHM

Order: 18

Horizontal side: 54 Vertical side: 54

Elements: 1, 2√2, 4, 3√2, 4√2, 6, 8, 6√2, 7√2, 13, 14, 13√2, 14√2, 20, 17√2, 20√2, 34, 27√2.

Code: 345 0 20 274 27 27 136 41 41 143 41 27 135 41 28 17 41 28 83 42 20 42 46 24 64 48 22 146 40 14 74 34 20 43 46 20 22 48 22 205 0 0 204 20 0 36 37 17 67 40 20 170 37 17

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)

34
27√2
13√2
14
13
1
8
4√2
6√2
14√2
7√2
4
2√2
20
20√2
3√2
6
17√2