The total sum of the interior angles of a simple decagon is 1440°.
A decagon can be recognized as a polygon with 10 sides, 10 interior angles, and 10 vertices.
As a level 30, killing one almost upgrades you to level 45, which is the last tier of normal tanks.
How many sides are on a decagon? Besides, you can insert an icon to symbolize your step in the colorful outer part of the polygon.
Therefore, a convex nonagon is a polygon that has all its nine interior angles less than 180 degrees.