Understanding 2D and 3D shapes

2.14. 3-D Shapes - Telugu

Arvind Gupta 3-D Shapes | Telugu | Amazing Maths Video shared with Creative Commons Attribution license (reuse allowed)

 

 You can make very beautiful 3-D shapes using old toothpaste tube and other cardboard boxes. Take a cardboard box and cut flaps on both ends. Flatten the box which has a square cross-section with each edge of 55-mm. Now measure one short edge of the box and measure the same amount along the length. Cut two such sections. These hollow sections will have a length, width and height of 55-mm. Tuck one section in the other to make a self-locked CUBE. This is a no-glue cube with which can easily play with. To make a HEXAGON BOX cut three equal pieces of length 31.8-mm from the same box whose cross-section is a square with an edge of 55-mm. First assemble two sections and then tuck in the third to make a beautiful HEXAGONAL BOX. To make an OCTAGONAL BOX cut four equal pieces of length 22.8-mm from the same box whose cross-section is a square with an edge of 55-mm. First assemble two sections then the third and finally the fourth to make an OCTAGONAL BOX. All these elegant 3-D structures are made of square sectioned card boxes. In this case all three 3-D shapes have the same height of 55-mm. This work was supported by IUCAA and Tata Trust. This film was made by Ashok Rupner