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

Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:70AG GHM

Order: 18

Horizontal side: 70 Vertical side: 70

Elements: 1, 1√2, 2, 2√2, 5, 7√2, 10, 8√2, 10√2, 16, 20, 15√2, 17√2, 20√2, 30, 40, 30√2, 35√2.

Code: 407 0 70 176 23 53 202 60 50 201 60 70 102 70 60 101 70 70 306 40 30 86 15 45 165 23 37 150 15 45 74 30 30 20 37 37 21 39 37 12 40 36 13 40 35 350 35 35 51 40 35 307 0 30

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)

40
17√2
20√2
20
10√2
10
30√2
8√2
16
15√2
7√2
2√2
2
1√2
1
35√2
5
30