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KatieMO
I do not get polygons at all...
regular hexagon internal angle = 120 =3x=>x=40
As you add more sides to a polygon the measure of the interior angles increases. The measure of each angle is given by: \[\frac{(n-2) × 180° }{ n}\] where n represents the number of sides. in the above case we are looking at a hexagon which has, six sides, so we have n = 6, plug and play