I think the most important event was when the pilgrims came to the Americas. Although they came there to escape persecution, they were the first to start a colony and life there. Once that colonization started, many other European also wanted to come to the Americas to find more freedom and escape persecution.
The sum of all interior angles is (n-2)x180 while n=number of sides. So (6-2)x180=720. The angles you have add up to 588. All you need to do now is 720-588.
