Outrageously Funny Word Dictionary :: Preagonal

👉 In geometry, a preagonal of a polygon is defined as one side that does not form part of any other sides or angles. It's also known as an external angle. For example, in a triangle, if you have a preagonal at 60 degrees, it means the third side (which is opposite to this angle) is 60 degrees from the base (the side opposite to the preagonal).

preagonal