Concept:The sum of the interior angles of an n-sided polygon is given by (n−2)×180∘.Explanation:Let the number of sides be n.Substitute the given sum into the formula:(n−2)×180∘=1080∘Divide both sides by 180∘:n−2=1801080=6Add 2 to both sides:n=6+2=8Answer:The polygon has 8 sides, so the correct option is D.