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Primitive Perfect Isosceles Right Triangled Square

Title: _d 18:40AP4of8 GHM

Order: 18

Horizontal side: 40 Vertical side: 40

Elements: 1, 1√2, 2, 2√2, 3, 4, 6, 5√2, 6√2, 7√2, 8√2, 12, 13, 14, 13√2, 20, 27, 20√2.

Code: 275 0 13 204 20 20 203 40 20 74 27 13 123 34 8 62 40 14 61 40 20 143 40 0 137 0 13 130 13 13 41 17 13 35 17 10 54 22 8 17 17 10 16 17 9 27 18 10 20 20 10 84 26 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)

27
20√2
20
7√2
12
6√2
6
14
13
13√2
4
3
5√2
1
1√2
2
2√2
8√2