8. If a polygon has its sum of interior angles smaller than $2005^{\circ}$, what is the maximum number of sides of the polygon?
(a) 11 ;
(b) 12 ;
(c) 13 ;
(e) 15 .
8 Ans: (c).
The sum of interior angles is $(n-2) \times 180^{\circ}<2005^{\circ}$. Hence the maximum $n$ is 13 .