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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:216CX GHM

Order: 19

Horizontal side: 216 Vertical side: 216

Elements: 1√2, 2, 2√2, 3√2, 4√2, 7√2, 10, 10√2, 20, 27√2, 54, 74, 54√2, 81, 88, 74√2, 81√2, 135, 142.

Code: 1425 0 74 1351 135 216 817 135 216 816 135 135 272 162 108 203 162 88 542 216 54 76 135 81 105 142 78 104 152 78 883 162 0 22 144 76 21 144 78 12 145 77 44 148 74 30 145 77 745 0 0 744 74 0 543 216 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)

142
135
81
81√2
27√2
20
54√2
7√2
10
10√2
88
2√2
2
1√2
4√2
3√2
74
74√2
54