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what is polyhedron?

Well done @Shivani Desai and @Rao Bopanna. Both of you have explained the concept of polyhedron very well. Kudos to both of you. Keep up the good work.

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 A polyhedron is a three dimensional figure made up of sides called faces, where each face is a polygon.

hope dis helps :)

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A polyhedron is a three dimensional figure made up of sides called faces, where each face is a polygon.

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A polyhedron is a solid with flat faces (from Greek poly- meaning "many" and -edron meaning "face").

Each face is a polygon (a flat shape with straight sides).

So, to be a polyhedron there should be no curved surfaces.

Examples of Polyhedra:

Triangular PrismCubeDodecahedron

Common Polyhedra

Platonic Solids
Prisms
Pyramids

 

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A solid whose boundary consists of a finite number of polygonal faces, that is, planar regions that are bounded by polygons. The sides of the faces are edges of the polyhedron; the vertices of the faces also are vertices of the polyhedron. 

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