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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:90AO GHM

Order: 18

Horizontal side: 90 Vertical side: 90

Elements: 1√2, 2, 2√2, 4, 5, 10, 10√2, 19, 20, 21, 25, 19√2, 35, 25√2, 36, 35√2, 55, 45√2.

Code: 555 0 35 454 45 45 256 65 65 203 65 45 255 65 40 104 55 35 103 65 35 55 65 35 41 69 40 22 71 38 211 90 40 23 71 36 192 90 19 14 70 35 363 71 0 355 0 0 354 35 0 193 90 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)

55
45√2
25√2
20
25
10√2
10
5
4
2√2
21
2
19√2
1√2
36
35
35√2
19