The pattern for the number of side is 6, 11, 16....
The common difference is 5
What is the pattern for the number of side?
6, 11, 16....
The first term, a = 6
Common difference, d = 11 - 6
= 5
The nth term of the sequence = a + (n -1)d
= 6 + (n - 1)5
= 6 + 5n - 5
= 5n + 1
Therefore, nth term = 5n + 1