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.
Sketch of problem 1357
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Problem 1358: Square, Regular Dodecagon
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