If you have a Lease, you should look to when the month-to-month obligations are effective. If it states that you pay on a calendar month basis, then your notice will be considered as being more that the required 30 days, and that you owe for the full following month.
A regular polygon is equiangular, which means all angles are the same measure. In the case of a regular hexagon, the sum of 720 degrees would be distributed evenly among the six sides. So, 720/6 = 120. There are six angles in a regular hexagon, each measuring 120 degrees.
Regular hexagons have six sides of equal length and interior angles that add up to 720 degrees. Hexagons don't have to have sides of equal length, though. Any closed shape with six sides is a hexagon. Hexagons that have sides of unequal length can be referred to as arbitrary hexagons. However, in a neat turn, according to Wolfram MathWorld, connecting the centroids of any arbitrary hexagon will result in a regular hexagon with six equal sides.