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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:40AI JDS

Order: 18

Horizontal side: 40 Vertical side: 40

Elements: 1√2, 2, 2√2, 3, 4, 3√2, 5, 5√2, 6√2, 10, 12, 10√2, 16, 12√2, 18, 20, 22, 20√2.

Code: 225 0 18 204 20 20 203 40 20 21 22 20 32 25 17 31 25 20 57 25 20 56 25 15 107 30 20 106 30 10 187 0 18 60 18 18 41 22 18 16 24 16 26 22 14 165 24 0 120 12 12 121 24 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)

22
20√2
20
2
3√2
3
5
5√2
10
10√2
18
6√2
4
1√2
2√2
16
12√2
12