Why rotating 3-point arc in a list generates a complementary arc?
王晓哲 shared this question 6 months ago
If a 3-point arc is put in a list and the list is rotated, then the result arc will be a complementary arc. But if the 3-point arc is rotated alone, the result is fine.
It's very confusing to me. Any suggestions?
Demostration is in the attachement.