Triangle
A polygon.
It is a polygon
A triangle cannot have two parallel sides. In order for a figure to be a triangle, it must be a closed figure with three sides and three angles. If two of the sides were parallel, there is no way the figure could be closed by only one other line.
polygon - D.A.
Triangle
A polygon.
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.
polygon
square
A three sided closed plane figure (shape) is a triangle.
yes it does. a polygon has to be a closed figure with a least three sides and it can only have straight sides--no curves
It is a polygon
A closed figure having three sides and three angles
A triangle cannot have two parallel sides. In order for a figure to be a triangle, it must be a closed figure with three sides and three angles. If two of the sides were parallel, there is no way the figure could be closed by only one other line.
A polygon is a closed figure bounded by sides. A triangle is a closed figure bounded by three sides. Therefore, according to the definition of polygon triangle is a polygon.
Quadrilateral