Derivative UltraPerfect Isosceles Right Triangled Square

Title: _t 16:80JC1of2 GHM

Order: 16

Horizontal side: 80 Vertical side: 80

Elements: 2, 2√2, 4, 6, 5√2, 8, 6√2, 10, 20, 20√2, 30, 25√2, 40, 30√2, 50, 40√2.

Code: 505 0 30 404 40 40 403 80 40 64 46 34 63 52 34 87 52 40 103 60 30 207 60 40 206 60 20 41 50 34 22 52 32 21 52 34 305 0 0 304 30 0 56 55 25 250 55 25

The properties below may precede order:side in a tiling's title:

• c = crossed. There is a tile-corner traversed by two lines. 18:48JB2of5 is the only known crossed DUIRTS of order < 19.
• d = double-pentagon patterned. Every such tiling is a subdivision of an instance of the same deformable tiling by two 45-90-90-90-225 pentagons with a shared side, four triangles and two pseudotriangles.
• e = elegant. No tile-corner is just a T-junction. Such tilings may be considered aesthetically pleasing. The only known elegant DUIRTS's of order < 19 are of order 18 and side 147.
• p/r/t = pseudotriangular/rectangular/triangular inclusion subdivided into at least 6/5/6 triangles respectively.

Credit for Discovery

Geoffrey H. Morley (GHM, England)

Jasper D. Skinner, II (JDS, United States)