Final answer:
A polygon with an interior angle sum of 900° has 7 sides.
Step-by-step explanation:
A polygon with an interior angle sum of 900° has 7 sides.
To find the interior angle sum of a polygon, you can use the formula: (n - 2) * 180°, where n represents the number of sides of the polygon.
For a polygon with 7 sides: (7 - 2) * 180° = 5 * 180° = 900°.