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Primitive Perfect Isosceles Right Triangled Square

Title: dr 19:142AP3of4 GHM

Order: 19

Horizontal side: 142 Vertical side: 142

Elements: 3, 3√2, 6, 6√2, 9, 10, 9√2, 10√2, 20, 21, 20√2, 31, 40, 51, 61, 71, 81, 61√2, 71√2.

Code: 815 0 61 714 71 71 713 142 71 104 81 61 103 91 61 315 91 40 511 142 71 617 0 61 610 61 61 211 82 61 92 91 52 91 91 61 66 85 46 36 82 43 65 85 40 35 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
10
31
51
61
61√2
21
9√2
9
6√2
3√2
6
3
40
20√2
20