8. the sum of the interior angles of a triangle is 180 degrees. for a quadrilateral the sum is 360 degrees. for a pentagon the sum is 540 degrees. what is the sum of the interior angles of a 35-sided polygon? (hint: derive the algorithm for the sum of the interior angles of any polygon, in terms of a multiple of 180º.) 5760º 6120º 5940º 6300º

Scenario: susan wants to make 2 square flags to sell at a crafts fair. the fabric she wants to buy is 3 meters wide. she doesn't want any fabric left over. what's the least amount of fabric she should buy? question: which equation will susan solve her problem? note: let x represent the length of 1 side of the flag. options: 1) 2x^2 = 4x 2) 8 +2x = 2(4x) 3) 2 * 2 = 4 * 2 4) 4x^2 -2x = 0