Crossings in a Regular Dodecagon
All the diagonals of a regular 12-gon are drawn. How many distinct points in the interior of the polygon lie on two or more diagonals? Give an integer.
Related problems & prerequisites
Worth solving first
- Polygon Diagonals 3.0/10
- The Handshake Count 3.0/10
- Threes and Fives 2.0/10
Source: Interior intersection points of the diagonals of a regular polygon (Poonen and Rubinstein, 1998); this case computed for AxiomIQ. Statement written for AxiomIQ.