Regular Octagon Area (related to the span)
Octagon is a polygon that has eight sides.
A regular octagon is a closed figure with sides of the same length and internal angles of the same size. The internal angle at each vertex of a regular octagon is 135°. The area of a regular octagon is related by the length of the side and the length of the span of the octagon, or the second shortest diagonal.
|Ao||Area of the octagon (m2)|
|S||Length of the span( the second shortest diagonal) (m)|
|a||Length of the side (m)|