A triangle.
A polygon, but only if all the line segments are coplanar.
a closed, flat figure is a polygon. But it is only a polygon when it is not round.
A simple straight line.It join two vetices(corners) of a polygon(a closed figure made of straight lines).
Closed
Yes. A simple closed figure is counted as a polygon for a polygon is closed.
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.
polygon
A simple polygon is a closed, straight-sided figure in which the sides do not overlap.
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.
A triangle.
closed figure
It is a regular polygon.
If they are straight lines then it is a polygon.
yes, a triangle is a closed figure
It is called its perimeter.
A polygon, but only if all the line segments are coplanar.