In the activities in the text, you determined the rule for finding the sum of the interior angles of a polygon, 180 (n - 2), where n is the number of sides of the polygon. Problem H1 presents an alternative approach for finding the sum of the interior angles in a polygon. Think about the two rules and explain why they are the same.
This is similar to the well-known handshake problem: If each person shakes hands with another person, how many handshakes will there be for a total of n people?