Class 6 Maths Understanding Elementary Shapes Three Dimensional Shapes

 

Three Dimensional Shapes

The shapes which can be measured in 3 directions are called three-dimensional shapes. These shapes are also called solid shapes. Length, width, and height (or depth or thickness) are the three measurements of the three-dimensional shapes. Sphere, cone, cylinder, cuboid, cube are examples of three-dimensional shape.

Faces, edges and vertices:

Let us consider cube.

Each side of the cube is a flat surface called a flat face or simply a face.

When two faces meet at a line segment then it is called an edge.

Three edges meet at a point called a vertex.

          Class_8_Visualising_Solid_Shapes_Example_1Class_8_Visualising_Solid_Shapes_Different_View_Of_Cube

Problem: What shape is:

(a) Your instrument box?            (b) A brick?                       (c) A match box?

(d) A road-roller?                          (e) A sweet laddu?

Solution:

(a) An instrument box has shape of cuboid.

                   Class_6_Maths_Understanding_Elementary_Shapes_Geometry_Box                                              

(b) A brick has shape of cuboid.

                 Class_6_Maths_Understanding_Elementary_Shapes_Brick                                                       

(c) A match box has shape of cuboid.

           Class_6_Maths_Understanding_Elementary_Shapes_Match_Box                                                              

 

(d) A road-roller has shape of cylinder.

         Class_6_Maths_Understanding_Elementary_Shapes_Road_Roller                                                               

(e) A sweet laddu has shape of Sphere.

                              Class_6_Maths_Understanding_Elementary_Shapes_Laddoo                                                     

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