It is a polygon that has three or more straight lines joined together at each vertex.
Any closed figure formed by a set of straight linesegments is a polygon. If the segments are curved such as in a circle or oval, the closed figure is not a polygon.
A triangle.
triangle
A polygon, but only if all the line segments are coplanar.
A triangle.
Any closed figure formed by a set of straight linesegments is a polygon. If the segments are curved such as in a circle or oval, the closed figure is not a polygon.
If they are straight lines then it is a polygon.
A polygon.
A triangle.
polygon
A polygon.
polygon
polygon
triangle
A polygon, but only if all the line segments are coplanar.
If the question required that the lines were straight, then they would be polygons, but since the question does not, there is nothing that can be said about the figures.
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.