See Area of a Regular Polygon. The polygon is the convex hull of its edges. E Is For Explore Polygon Patterns Polygon Pattern Math Concepts Math To get the area of the whole polygon just add up the areas of all the little triangles n of them. . The area of a polygon is defined as the measurement of space enclosed within a. Therefore a hexagon has an interior angle sum of 720 degrees and each interior angle of a regular hexagon has a measure of 120 degrees. We can use this formula to find the number of diagonals of any polygon without actually drawing them. If one of its diagonals is 16 m find the cost of painting its both sides at the rate of 6 per m 2. If its area is 384 cm 2 find its side. For an n-sided polygon the number of diagonals can be calculated with this formula nn-32. A polygon with at least one interior angle is greater than 180 is called a non-convex polygon or concave polygon. Diagonals for