Understanding 2D and 3D shapes

1. Basic 2 Dimensional (2D) Shapes

This video Basic 2 Dimensional (2D) Shapes by GyanLab is shared with Creative Commons Attribution license (reuse allowed)

1.1. Introduction to Shapes (3:13)

Introduction to Shapes Video by Maths Online

1.2. Names of Basic Shapes (1:57)

Names of Basic Shapes video by www.MathWithLarry.com -- Free Online Math Help

1.3. The Shape Train

The Shape Train - Learning for Kids video by vidz4kids

Climb aboard the shape train and explore basic shapes from triangles to octagons.

1.4. Recognizing shapes (6:08)

Recognizing shapes video is shared by Khan Academy

Learn how to identify circles, triangles, squares, rectangles, rhombuses, and trapezoids.

2. 3D Shapes

Learn about and recognise 3D shapes.

2.1. Learn 3D Shapes - Sphere (2:15)

"Learn 3D Shapes - Sphere" video by Kids Vids SCJ.

2.2. Learn 3D Shapes Rectangular Prism (1:31)

"Learn 3D Shapes Rectangular Prism" video by Kids Vids SCJ.

2.3. Learn 3D Shapes - Pyramid (1:43)

"Learn 3D Shapes - Pyramid " video by Kids Vids SCJ.

2.4. Learn 3D Shapes - Prism (1:56)

"Learn 3D Shapes - Prism " video by Kids Vids SCJ.

2.5. Learn 3D Shapes Cylinder (1:43)

"Learn 3D Shapes Cylinder" video by Kids Vids SCJ.

2.6. Learn 3D Shapes - Cone (1:30)

"Learn 3D Shapes - Cone" video by Kids Vids SCJ.

2.7. Learn 3D Shapes - Cube (1:30)

"Learn 3D Shapes - Cube" video by  Kids Vids SCJ.

2.8. Recognising 3D Objects (2:11)

Recognising 3D Objects video shared by CTCMath

2.9. Is there a specific system as to how you name shapes?

Whenever you see these following pre-fixes, you can know how many sides there are!     

Octo =8
Hex =6
Tri =3
Non =9
Deca =10
Penta =5
         

2.10. Which of these shapes are octagons?

Source: Khan Academy

2.11. Which shape has 4 sides of the same length?

Source: Khan Academy

2.12. Compose shapes (2:03)

"Compose shapes" video shared by Khan Academy

Learn how to combine shapes to make other shapes.

2.13. What is the difference between a trapozoid and a rhombus

A rhombus has two pairs of parallel sides where a trapozoid only has one pair. 

2.14. 3-D Shapes - Telugu

 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