A plane shape.
There is no specia name unless all the line segments are straight.
If the line segments are straight, then it is a triangle.
A closed plane figure formed by three or more line segments that do not cross is called a polygon. The line segments are known as the sides of the polygon, and the points where the sides meet are called vertices. Common examples of polygons include triangles, quadrilaterals, pentagons, and hexagons. Polygons can be classified as regular, with equal sides and angles, or irregular, with varying lengths and angles.
A irregular is a closed plane figure formed by three or more line segments.
a polygon is a closed plane figure bounded by 3 or more line segments
A Triangle :)
a closed plane figure with 3 or more line segments is a polygon
A polygon, if all the line segments are in the same plane.
A polygon
A closed figure made up of line segments is called a polygon. The segments in a polygon are called sides or edges.
US DefinitionA trapezoid is a closed plane figure consisting of four line segments/sides; two of these line segments are parallel (but not equal in length) and two are nonparallel.(in the UK, this is called a trapezium)British DefinitionA trapezoid is a closed plane figure consisting of four line segments/sides; NONE of these line segments are parallel to any of the other line segments of the quadrilateral.(in the US this is just a quadrilateral)*(see the related links for images of trapezoids)
polygon
polygon
A polygon is a plane figure that is closed with straight line segments.
polygon
Polygon
If the line segments are straight, then it is a triangle.
a polygon