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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:40AH2of2 GHM

Order: 18

Horizontal side: 40 Vertical side: 40

Elements: 1, 3, 4, 3√2, 6, 8, 6√2, 9, 10, 11, 8√2, 12, 10√2, 11√2, 16, 20, 16√2, 20√2.

Code: 205 0 20 204 20 20 166 24 24 43 24 20 165 24 8 102 10 10 91 9 20 37 9 20 30 12 20 121 24 20 67 9 17 60 15 17 11 10 11 117 10 11 110 21 11 103 10 0 84 32 0 83 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
20√2
16√2
4
16
10√2
9
3
3√2
12
6
6√2
1
11
11√2
10
8√2
8