NDA2011MathematicsPermutation and CombinationActual
How many diagonals will be there in an n -sided regular polygon?
Options
- An(n-1) 2
- Bn(n-3) 2
- Cn^2-n
- Dn(n+1) 2
Correct answer
B. n(n-3) 2
Step-by-step solution
The correct answer is option B