ATM triangles

Sequence 1 (atm_2021...)
Sequence 2 (atm_2021...)
Sequence 3 (atm_2021...)
Sequence 4 (atm_2021...)
Sequence 5 (atm_2021...)
Sequence 6 (atm_2021...)
Sequence 7 (atm_2021...)
All sequences (atm_2021_all_sequences)
Dick's booklet (excerpts) and proof hints (dick's_triangle_booklet)
Booklet 2 (dick's_geometry_booklet)