Check the picture below.

since the distance AB cannot be a negative value, thus is not -3-√(130).
The equation for this is (n-2) x 180
Replace n with the number of sides:
a. 9: (9-2) x 180 = 7 x 180 = 1,260
b. 19: (19-2) x 180 = 17 x 180 = 3,060
Answer:
5?
Step-by-step explanation:
You start from negative -1 and you got all the way to 4, so the distance in-between the objects are 5
Answer:
0.99
Step-by-step explanation:
cos(arcsin(5/30)) = 0.98601 ≈ 0.99