Trapezoid
A pentagon is a 5 sided polygon
A figure made with five lines is often referred to as a "pentagon." In geometry, a pentagon is a five-sided polygon. If you're referring to a drawing or symbol created with five lines, it might also be called a "quintet" or "pentagram," depending on the context.
An octagon is an eight-sided figure.
yes
impossible?
In geometry, a heptagon is a polygon with seven sides and seven angles.
trapezoid :)
parrellogram
A 5 sided polygon in geometry is a pentagon.
1
If the lines are straight then it IS a triangle.
Anything from none to 8.