If each interior angle of a regular polygon is 135°, then the number of sides that polygon has is:A10B12C15D8Answer: D. 8 Read Explanation: Solution:Given :The interior angle of a polygon is 135o.Formula used:Sum of interior angle = (n - 2) × 180o [Where n is the number of sides of the polygon]Calculation:Let the number of sides of the regular polygon be n.So it can be written,135° × n = (n - 2) × 180°⇒ 135° × n = n × 180° - 360°⇒ 45° × n = 360°=>n=\frac{360^o}{45^o}=8Hence, the number of sides of the polygon is 8.Hence, the number of sides of the polygon is 8. Read more in App