The question is how many little tetrahedra, like the blue model shown, were used to make the 6.5 metre high red balloon model tetrahedron below It was built in a shopping mall in Cambridge, UK to set a Guinness World Record.
The smallest tetrahedron (Stage 0), the blue model, is made from […]
Describe 3D objects that could have made these shadows. There is more than one answer for each shadow.
Can you draw different shadows that could be made by the same objects?
What sort of shadows […]
Each regular polyhedron has its own codename. The tetrahedron is 333, the octahedron is 3333, the icosahedron is […]
How many faces, edges and vertices does a cube have?
The picture shows the 7 pieces of the Soma Cube Puzzle. They are made from cubes glued together. Contrasting colours make the puzzle easier to solve as the aim is to assemble the pieces to give a chequerboard effect.
If you make your own puzzle then you can enjoy solving many more challenges. A large […]
First make 6 paper sticks, all the same length, by rolling paper tightly round pieces of string and securing with sticky tape. Then make a rhombus by tying together 5 sticks to make 2 equilateral triangles. Use the rhombus and the one remaining stick to make a shape with […]
Make a tetrahedron out of rolled paper sticks. Press it gently.
See that it does not change its shape – it is rigid.
Make a 3D cube out of rolled paper sticks, tied together at the ends. Push your cube gently down and sideways. It will collapse into a 2D shape. Can you collapse your cube into
a 2D rectangle made of 2 squares?
Can you fold […]
Make 6 paper sticks, all the same length, by tightly rolling a piece of paper around a piece of string and securing it with sticky tape. If you have not made paper sticks before see the video: https://youtu.be/iaJ6EitIGKU