0.09 is the mean
hope this helps
It contains 2 numbers of terms
15 is answer for the missing side
(2, ∞) ..................................
<span>(n-2)180=sum of the interior angles.
Where n=number of angles of a regular polygon.
(n-2)180=2340
divide both sides by 180 and get
n-2=13
add 2 to both sides and get
n=15 Therefore, this polygon has 15 sides.</span>