Answer:

19 sides

Step-by-step explanation:

Sum of interior angles can be found using:

Sum of Interior Angles = (n-2)×180

where n = # of sides of the polygon

so let's solve for n,

Sum of Interior Angles = (n-2)×180

3060 = (n-2)×180

divide both sides by 180

3060/180 = (n-2)×180/180

n-2 = 17

n = 19

Hence the # of sides = 19.