You can put this solution on YOUR website! The total number of degrees in a polygon of n sides is
180(n-2)
Here n = 7 so the total is 180(7-2) = 180(5) = 900 degrees
Two angles of 120 have been spoken for...that's 240 degrees, leaving
900 - 240 = 660 degrees to be split evenly between the five other angles.
660 / 5 = 132 degrees each.