Cutting Moons - Numberphile
Numberphile · 13:09 · Watch on YouTube
A paper crescent moon (lunula) cut by n straight through-cuts yields at most (n+2)(n+1)/2 pieces — i.e. 1, 3, 6, 10, 15... — one more triangular layer than the classic pancake problem, and Euler's formula proves it op...