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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:40AE GHM

Order: 18

Horizontal side: 40 Vertical side: 40

Elements: 1√2, 2√2, 3√2, 5, 4√2, 6, 7, 5√2, 8, 8√2, 12, 14, 10√2, 16, 12√2, 14√2, 16√2, 20√2.

Code: 202 20 20 164 16 24 163 32 24 82 40 32 81 40 40 106 30 22 71 23 24 57 23 24 56 23 19 122 40 12 24 30 22 63 20 14 32 23 17 12 24 18 40 24 18 140 14 14 141 28 14 123 40 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)

20√2
16√2
16
8√2
8
10√2
7
5
5√2
12√2
2√2
6
3√2
1√2
4√2
14√2
14
12