Hans for FIDE president.
January 26, 2025 at 1:39 PM
Hans for FIDE president.
I remember this from high school. The usual statement is: the composition of 3 rotations with angles 2a, 2b and 2c is the identity if and only if the centres of the rotations form a triangle with angles a, b and c.
October 23, 2023 at 3:50 PM
I remember this from high school. The usual statement is: the composition of 3 rotations with angles 2a, 2b and 2c is the identity if and only if the centres of the rotations form a triangle with angles a, b and c.