Answer:
Step-by-step explanation:
Equation
L = a + (n - 1)*d
Givens
L = 55
a = 13
n =8
Solution
55 = 13 + (8 - 1)*d Combine
55 = 13 + 7d Subtract 13 from both sides
55 - 13 = 7d
42 = 7d Divide by 7
d = 6
It is okay to take the inverse of both side given that you remember to exclude the value that make the denominator zero which is in this case r=-1
Divide 6 by 11: 6/11=.5454545 :)
A) hexagonal prism......................................................................
68. add the two measures then subtract from 180.
