A closed three-dimensional figure formed by four or more polygons that intersect only at their edges is called a polyhedron. It contains flat faces, straight edges, and sharp corners or vertices.
polygons
Only A (It is a closed figure) is true. The rest are incorrect because they define specific regular polygons. If you consider B (It is a quadrilateral), you must follow the logic that all quadrilaterals are polygons but not all polygons are quadrilaterals (an easier-to-follow example of this logic is: All fathers are male, but not all males are fathers).
A polygon.
triangel
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.
polygons
Polyhedron
impossible?
regular polygon-all the sides are the same length and the angles have the same measurement. polygon-a closed plane figure whose sides are segments that intersect at their endpoints.
polygons
triangles , polygons ,quadrilaterals
No. Like all polygons, a heptagon is a 2-dimensional closed figure.
Polyhedra (singular: polyhedron)
A polyhedran is a 3-dimentional figure that has sides that are polygons. A polygon is a 2-dimentional figure with straight sides, a closed side.
To be a polygon there has to be three or more sides. None of the sides can be curved or intersecting and the figure has to be closed.
A polygon is a closed figure with only straight edges. A polygon has at least 3 sides.
A polygon is any closed plane figure bounded by three or more straight sides.