Posted in Numeracy

Nets of 3D shapes

Cube net

The video clip below shows a net made from Polydron. You can change the net using the drop down menu on the right hand side. When you press play, you will see the attempt to assemble the net into a solid 3D shape. Sometimes they will succeed, sometimes they will fail.

 

 

Before watching each video clip, consider these questions:

  1. Can you imagine folding the net up into a solid shape?
  2. Do you think that the net will fold into a shape with all sides clicked together?
  3. Can you imagine the shape of the final solid if the net does indeed correctly fold together?

Record your predictions and discuss with a partner before watching the the video for each net.

http://nrich.maths.org/6307

  1. Were you correct? Was the result a surprise in any way?
  2. Try again to imagine how the shape folded together.

Draw an accurate drawing of the net in your book. Can you see which sides joined together? Can you indicate this clearly on your diagram? Can you prove your net works?

What did you find out today?

What questions do you still have?

11 thoughts on “Nets of 3D shapes

  1. Dear Miss Scarrott
    Today we found out that different 2D shapes can be folded into a 3D shape. We would like to know if there is more than 10 sides in a 3D shape
    From Bruke and Gae Soe

  2. Dear Miss Scarrott,

    Thank you for this activity! It’s very fun and challenging!
    Today we found out that there’s not only one net to create a certain shape.
    We would like to know what net six is called and also how it worked.

    By Say Meh and Angela

  3. Today we found out that triangular pyramid can be small, can be big it’s always the same and that the net of diamond can appear something that looks like a different shape. We would like to know a new shape of a net that we haven’t seen before.
    From Ke Bre and Noah

  4. Dear Miss Scarrott
    Thank you for showing us this activity it was really fun and interesting.
    Today we found out that a cube as more than 1 net to create it. We also found out some of the names of the shapes like triangular pyramid.
    We would like to know the rest of the names of shapes that we don’t know yet and we would like to know how to draw some of the shapes.
    From Emma and Hser eh moo

  5. Dear miss Scarrott

    Today we found out that there are many different ways to make the same 3D shape such as a cube, square based pyramid and a rectangle prism we would like to know what are the most challenging 3D nets to make into the actual shape. And we will like to know more different types of ways to create a 3D shape?
    From Samuel and Murat

  6. Dear Miss Scarrott,

    Today we found out that there are 12 sided prisms and that there are all different types of shapes. We would like to know what a twelve sided shape is called and a 14 sided shape is called.

    From Mark and Jemma.

  7. Dear Miss Scarrott Today we found out that you can make Square Base Pyramid different ways or more.
    We will like to learn more about different 3D shapes and learn how to pronounce them.

    From Simon and Htaw Nay

  8. Today I found out that there is so many 3D shapes.

    I would like to know more names of 3D shapes.
    eg: I already know a sphere, a cube and a triangular pyramid.
    By Nathan

  9. Dear Miss Scarrott,
    Thank you for that interesting maths lesson we learnt lots of 3D shapes nets.
    Today we found out that there is more than 1 way to make Triangular Pyramid with nets.
    We would like to know what different types of shapes are called.
    From Gracie and Jorja.

  10. Dear Miss Scarrott,
    Today we found out there is a shape made out of triangles that looks like a 3D diamond. We would like to find out what the name is. We would also like to know the names of other shapes. We enjoyed todays lesson because we had fun guessing the shape and the making the cube was a fun hands on activity. 

  11. Dear Miss Scarrott,

    Will and I would love to know what most of the shapes are. One in particular is net 4 most of the shapes were amazing, extraordinary so thanks for showing us we found out so much.

    From Brandon and Will :]

Leave a Reply

Your email address will not be published. Required fields are marked *