Sum of internal angles of any polygon is: (n-2)x180 So measure of an interior edge is ( ( n - 2 ) x 180 ) / n = 140 So 140n = 180n - 360 40n = 360 n = 9 So it's a nonagon.
If there's 21 spoons and 27 forks than there are 48 utensils, and the ratio of spoon to total stilis is 21/48, and if you reduce that it is 7/16. So your answer is B. 7/16.<span />
