Dodecagon
Geometry
Level
3
How many diagonals does a dodecagon(a 12-sided polygon) have?
60
48
66
6
54
24
18
36
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1 solution
Formula for number of diagonals for n-sided polygon is (n(n-3))/2 . So if n=12 then number of diagonals are (12*9)/2=54