Answer:
M = (n-2)*180 degrees for polygons with n sides.
Explanation:
As already noted, there is no description of the polygon in question. However, the formula for the sum of the measure of the interior angles of a regular polygon is M = (n-2)•180 where n is the number of sides. A triangle has 3 sides, so M = (3-2)*180 = 180 degrees.
A hexagon has 6 sides, so M = (6-2)*180 = 720.