Geometry Problem 1358: Regular Dodecagon, Diagonal, Concurrency, Concurrent Lines.

Proposition

The figure below shows a regular dodecagon ABCDEFGHJKLM. Prove that diagonals AE, BF, CH, and DL are concurrent at P.
 


Geometry Problem 1358: Regular Dodecagon, Diagonal, Concurrency, Concurrent Lines
 


Sketch of problem 1358


Sketch of Geometry Problem 1358 using iPad Apps, Tutor