Squaring.net >> IRTS >> PPIRTSS >> Order 18

Primitive Perfect Isosceles Right Triangled Square

Title: _d 18:108AO4of8 GHM

Order: 18

Horizontal side: 108 Vertical side: 108

Elements: 4, 4√2, 7, 8, 7√2, 8√2, 12, 14, 12√2, 14√2, 21, 28, 40, 47, 54, 61, 47√2, 54√2.

Code: 615 0 47 544 54 54 543 108 54 74 61 47 73 68 47 125 68 42 401 108 54 477 0 47 470 47 47 211 68 47 82 76 34 81 76 42 42 80 38 41 80 42 285 80 14 126 68 26 144 94 0 143 108 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)

61
54√2
54
7√2
7
12
40
47
47√2
21
8√2
8
4√2
4
28
12√2
14√2
14