yes polygons are closed figures
yes, star shaped figures ARE polygons.
Quadrilateral
they are circle figures
Polygons for example
All polygons
Polygons are closed plane shapes bounded by straight lines.
polygons are a subcategoryof two-dimensionalfigures
Polygons are flat shapes with many sides
Many 3-d figures can have polygons for bases. If all ist faces are polygons then it is a polyhedron but it is possible to have 3-d figures with a polygonal base and non-polygonal faces.
Yes quadrilaterals are 4 sided closed figures or polygons
Polygons