Question

I do not get polygons at all...

Answer 1

regular hexagon internal angle = 120 =3x=>x=40

Answer 2

???

Answer 3

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