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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:40AN JDS

Order: 18

Horizontal side: 40 Vertical side: 40

Elements: 1√2, 2, 2√2, 3, 4, 3√2, 4√2, 6, 7, 7√2, 10, 8√2, 10√2, 15, 20, 15√2, 25, 20√2.

Code: 255 0 15 204 20 20 203 40 20 61 26 20 42 30 16 74 33 13 106 30 10 86 22 8 32 33 13 157 0 15 150 15 15 71 22 15 37 22 15 10 25 15 20 24 14 21 26 14 47 22 12 105 30 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)

25
20√2
20
6
4√2
7√2
10√2
8√2
3√2
15
15√2
7
3
1√2
2√2
2
4
10