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Number of faces, edges and vertices of some solids
1.    Cuboid    

A closed solid shape that has six rectangular surface is called a cuboid.
    (i)     The 8 corners of the cuboid are its vertices.
    (ii)     The 12 line segments that form the skeleton of the cuboid, are its edges.
    (iii)     The six flat rectangular surface that are the skin of the cuboid are its faces.

2.    Cube    
    A cube is a special kind of cuboid whose length, breadth, and height are equal.
    (i)     The 8 corners of the cube are its vertices.
    (ii)     The 12 line segments that form the skeleton of the cube are its edge.
    (iii)     The six flat rectangular surface that are the skin of the cube are its faces.

 

3.    Cylinder                                       
    A cylinder is a solid shape whose top and bottom are circular while the rest of the surface is curved.
    (i)     Number of faces is 3.
    (ii)     Has no vertex.

 

4.    Cone
    A cone is a solid shape having a plane circular end as the base and whose lateral surface is the curved surface tapering into a point, is called the vertex of the cone.
    (i)     Number of faces is 2.
    (ii)     No. of vertex 1
    (iii)     No. of edges 1

5.    Sphere
    A solid (3D) shape that has only a curved surface is called sphere.
    (i)     Number of faces is 1.

6.    Prism
    A prism is a solid whose base are identical polygonal shapes (Triangles, Quadrilateral, Pentagons) and other faces are rectangles.

7.    Pyramid 
    A pyramid is a solid whose base is a flat polygonal surface and whose side faces are triangles having a common vertex outside the surface of the base.


 

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