7 similar triangles in square, angle = 34.3068051241 degrees
(Click on image for high-quality PDF version)
For general details about this class of tiling, see.
- This is not a repeat pattern and hence has no symmetry.
- The square contains 7 similar but not identical triangles.
- From Tony Lee of Not specific. Personal Communication, Information sent to the author, 21c. [pc]