SOLUTION: hi can you explain to me how to find the size of one interior angle in a regular polygon with 9 sides . thank you
Algebra ->
Polygons
-> SOLUTION: hi can you explain to me how to find the size of one interior angle in a regular polygon with 9 sides . thank you
Log On
Question 457169: hi can you explain to me how to find the size of one interior angle in a regular polygon with 9 sides . thank you Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! The sum of interior angles = 180*(n-2) degrees, where n = # of sides
180(9-2) = 1260 total
1260/9 = 140 degrees
----------------------
A better way:
The sum of exterior angles for all polygons = 360 degs (even a circle)
360/9 = 40 degs exterior
180 - 40 = 140 degs internal
