The border of a susan b. anthony dollar is in the shape of a regular polygon. how many sides does the polygon have what is the measure of each angle of the border round your answer to the nearest degree

It has eleven sides.

I believe the angle is roughly 175 .

                          (: I hope this helps! :)

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for