Geometry Problem 1357: Regular Dodecagon, Diagonal, Concurrency, Collinearity, Points, Lines. Math Infographic.

Proposition

The figure below shows a regular dodecagon ABCDEFGHJKLM. JA and DC extended intersect at N. Prove that points N, B, and F are collinear.
 


Geometry Problem 1357: Regular Dodecagon, Diagonals, Concurrency, Collinearity, Points, Lines. Math Infographic
 


Sketch of problem 1357


Sketch of Geometry Problem 1357, Tutor