1/2*(362-3*36) = 594 diagonals
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65. The equation to figure the number of diagonal lines for any polygon is n(n-3)/2. n= number of vertices
How many diagonal lines does a 1million sided shape have
0.5*(172-51) = 119 diagonals
It has 170 diagonals by using the diagonal formula
A regular 24 sided polygon has 24 lines of symmetry.