Write an article based on this "Draw the polygon whose angles you need to sum. Choose one vertex. Draw a straight line from Point A to each other vertex in the polygon. Multiply the number of triangles you created by 180."
The polygon can have any number of sides and can be regular or irregular. For example, you might want to find the sum of the interior angles of a hexagon, so you would draw a six-sided shape. Label this vertex A. A vertex is a point where two sides of a polygon meet. The lines should not cross. You should create a number of triangles.  You do not have to draw lines to the adjacent vertices, since they are already connected by a side. For example, for a hexagon you should draw three lines, dividing the shape into 4 triangles. Since there are 180 degrees in a triangle, by multiplying the number of triangles in your polygon by 180, you can find the sum of the interior angles of your polygon. For example, since you divided your hexagon into 4 triangles, you would calculate 4×180=720{\displaystyle 4\times 180=720} to find a total of 720 degrees in the interior of your polygon.