Answer:
7 slides
Explanation:
Sum of exterior angles of any polygon is always 360∘, it can never be 900∘. Hence, there cannot be any polygon like this.
It appears that by error the word "exterior" has been mentioned. In case sum of interior angles is 900∘,
total sum of all the angles is 900∘+360∘=1260∘.
But sum of each pair of interior and exterior angles add up to 180∘
we have 1260∘180∘=7 such pairs
and hence polygon has 7 sides.