Question

I don't know if it's supposed to do with (n-2)180
Also please explain :D

Answer 1

Step-by-step explanation:

$ sum \: of \: interior \\ \: angels \: is  \: 2340 \:  degrees. \\

(n−2)⋅180=2340 \\

180n - 360=2340 \\ 180n = 2700 \\

n=15 \\

 

number \: of \: sides=15$

the polygon is 15 sided.