A triangle ?
Well a triangle has 3 sides and vertices.
Any polygon is.
Any closed polygon could be made using the descriptions above.
Yes, a plane figure made up of straight line segments that are joined together to form a closed shape is known as a polygon. Examples of polygons include triangles, quadrilaterals, pentagons, and hexagons. Each polygon has a specific number of sides and vertices, and the sides do not intersect except at their endpoints.
right angle
Spatial figure is a three dimensional figure. It is made up of plane figure whose all sides are joined together to form a close figure
You may be fishing for "polygon", but I thinksomething in your description has gang aglae.
a polygon is a closed up shape with vertices and sides ,for example a triangle is a polygon because it is made up of 3 sides and 3 vertices
Three or more line segments joined together by vertices.
It can be, if all the vertices of the pentagon are joined to its centre. But if they are joined to any other point, it will not be.
Hexagon
Polygon