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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:66AM GHM

Order: 18

Horizontal side: 66 Vertical side: 66

Elements: 1√2, 4√2, 8, 8√2, 12, 9√2, 14, 16, 12√2, 18, 14√2, 15√2, 24, 18√2, 26, 24√2, 27√2, 42.

Code: 427 0 66 126 30 54 247 42 66 246 42 42 263 30 28 272 57 27 40 4 28 121 16 28 147 16 28 146 16 14 90 57 27 87 0 24 80 8 24 180 48 18 181 66 18 167 0 16 16 15 15 150 15 15

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
12√2
24
24√2
26
27√2
4√2
12
14
14√2
9√2
8
8√2
18√2
18
16
1√2
15√2