A) 7
B) 9
C) 12
D) 11
E) None of these
Correct Answer: C
Solution :
Explanation Option [c] is correct. \[\frac{n\,(n-3)}{2}=54{}^\circ \Rightarrow {{n}^{2}}-3n=180{}^\circ \Rightarrow n=12\]
You need to login to perform this action.
You will be redirected in
3 sec
