A trapezoid
A one sided shape
Five sided and Five angle shape can only mean one thing you nimrods its a pentagon.
A one sided shape (ignoring the poor grammar) is a line. Is that what you wanted?
A semicircle is one possible answer.
A 16 sided shape could look like anything as long as there are 16 sides and they are connected to one another.
A trapezoid
A one sided shape
it is called a henagon is a one sided shape
a one sided shape is called a henagon and a 2 sided shape is called a digon
pentigonon
square
A 6-sided shape is one kind of polygon. It can also be called a hexagon.
An 80 sided shape is called a Octacontagon.
I don't believe there is a name for the first one, but a 14-sided shape is called a tetradecagon.
I guess you could say that a Mobius strip is a one-sided shape. Or a circle, because there are no corners or divisions where another side starts.
Centagon