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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:72AV2of2 JDS

Order: 18

Horizontal side: 72 Vertical side: 72

Elements: 1√2, 2, 2√2, 3√2, 6, 8, 10, 8√2, 10√2, 16, 20, 16√2, 24, 20√2, 32, 40, 32√2, 36√2.

Code: 407 0 72 320 40 72 321 72 72 86 0 32 165 8 24 164 24 24 16 39 39 27 40 40 26 40 38 107 42 40 106 42 30 207 52 40 206 52 20 30 39 39 360 36 36 61 42 36 85 0 24 247 0 24

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)

40
32√2
32
8√2
16
16√2
1√2
2
2√2
10
10√2
20
20√2
3√2
36√2
6
8
24