The number of diagnosis of a 12 sided figure is _____?
- 54
- 48
- 30
- None of these
Explanation
The number of diagonals in a polygon can be calculated using the formula:
n(n-3)/2
where n is the number of sides.
For a 12-sided polygon (dodecagon):
n = 12
Number of diagonals = 12(12-3)/2
= 12(9)/2
= 108/2
= 54
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