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Primitive Perfect Isosceles Right Triangled Square

Title: _d 19:142AQ GHM

Order: 19

Horizontal side: 142 Vertical side: 142

Elements: 1√2, 3√2, 6, 6√2, 9, 12, 10√2, 11√2, 18, 20, 20√2, 31, 40, 51, 61, 71, 81, 61√2, 71√2.

Code: 815 0 61 714 71 71 713 142 71 104 81 61 116 80 60 315 91 40 511 142 71 617 0 61 610 61 61 181 79 61 125 79 49 14 80 60 65 79 43 64 85 43 93 91 40 34 82 40 401 122 40 202 142 20 203 142 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)

81
71√2
71
10√2
11√2
31
51
61
61√2
18
12
1√2
6
6√2
9
3√2
40
20√2
20