Question

find the measure of an interior angle of a regular polygon of nine sides
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Answer 1

Answer:

140 degree

Step-by-step explanation:

Sum of exterior angles of a regular polygon is equal to 360

so each exterior angle is  360/9 = 40 degrees

Interior angle = 180 - 40 =  140 degree

Answer 2

Answer:

140 degree

Step-by-step explanation:

Sum of exterior angles of a regular polygon is equal to 360

exterior angle is =  360/9

= 40 degrees

Interior angle = 180 - 40

                        = 140 degree