Answer: 72 ft
Step-by-step explanation:
Given
The width of a post is 
Posts are separated by
chain
for 2 posts, length is 
for 3 posts, length is 
for 4 posts, it is 
i.e. 11 ft is adding on the addition of another post
for 7 posts it is 
Thus, the total length of the fence is 
Answer:
52.64°
Step-by-step explanation:
sin x = 31/39
x =
(31/39)
x = 52.64°