The only shape that has that much is a decagon 10 sides. t<span>he </span>sum<span> of the interior </span>angles of a Regular Decagon is 1440 degrees.
To do this sum and to understand angles in polygons let's start at a triangle this has 180 deg,a square has 360 deg,a pentagon has 540 deg. Every time we add a side we add 180 deg. This finally accumulates to 1440 on a ten sided figure.
