If I understand the question correctly, the answer is a regular polygon. If not, apologies.
a polygon
A polygon is a 2-dimensional closed figure that has at least three sides. A pentagon is a 2-dimensional closed figure that has five and only five sides, so it is a kind of polygon.
A quadrilateral perhaps
a quadrilateral
A 5 sided pentagon
A closed figure made up of line segments is called a polygon. The segments in a polygon are called sides or edges.
a polygon
A polygon is a 2-dimensional closed figure that has at least three sides. A pentagon is a 2-dimensional closed figure that has five and only five sides, so it is a kind of polygon.
a quadrilateral
A quadrilateral perhaps
A triangle is a geometric figure that is made of three line segments. It is a closed figure and has three angles.
no, but an eight sided figure you could use is an octagon. a figure 8 may be a figure and closed but, it has no sides and no line segments.
a pentagon
A simple closed figure formed by three or more segments is called a polygon. Regardless of how many sides a polygon has, all polygons will have as many vertices as it has sides.
If it is a 2-dimensional figure, it is a polygon.
polygon
a polygon.