Something that is 8-sided is usually referred to as a octogon.
Two foreign kings attack Scottish kings. At the beginning of the play the King of Norway has sided with the Scottish rebels MacDonald and Cawdor against King Duncan. At the end the King of England, Edward the Confessor, has sided with Malcolm, McDuff, Ross and others against King Macbeth.
France, Spain, and many free black people fought for or with the American rebels.
Four sided figures are called quadrilaterals. They are usually squares, rectangles, trapizoids, etc..
Usually a 5 sided does have 5 sides. Although we don't have confirmation whether this is true in alternate universes. For example a 4 sided would have 4 sides.
delta
quadrangle
A steep-sided hill or mountain that stands alone and is usually smaller than a mesa is called a butte.
usually sided with management
a 5 sided shape usually in the shape of a house
The term single sided is usually used to refer to a DVD. It refers to a DVD disc that contains data only on one side of the disc. The single sided DVD may have two layers or have one layer.
The "one-sided" flag refers to an answer that is biased toward one view-point, usually when the question asks for multiple opinions.