geometry interior and exterior angles of polygons help?

1-C1ty-BoY-1

New member
find the number of sides of a regular convex polygon if the measures of its interior angles have a sum of 3600. what the heck is the formula for that?? i have to solve around 10 problems like thgis can anyone solve this one so i can get an example of how to do it? please explain yourself clearly. thanks!
 
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