P4-7 K'NEX 3D Shapes
You will need these K'NEX pieces
(you may have different colours)
Or you can use:
drinking straws, spaghetti or pencils instead of rods
and
plasticine, marshmallows or BluTac instead of connectors
Before you start,
it will help to look at this hint from the K'NEX User Group
Challenge 1: Build a square based pyramid
To describe the properties of a 3D shape we need to count the:
1. Edges (which join two corners)
2. Vertices (or corners)
3. Faces (or sides)
8 edges 5 vertices 5 faces
Write these numbers on your record sheet
Challenge 2: Build a prism
Count the number of edges, vertices
and faces and write them on your record sheet
Challenge 3: Build a tetrahedron
(also called a triangle-based pyramid)
Count the number of edges, vertices
and faces and write them on your record sheet
Challenge 3: Can you build a cube?
You may need more K'NEX
or straws/spaghetti/pencils/plasticine/Blu Tac/marshmallows
Count the number of edges, vertices
and faces and write them on your record sheet
Challenge 4: Build a tower
How tall is the tallest tower you can build
using only the equipment you have used during this lesson?
Great work!
Answers
Pyramid
| Edges | 8 |
|---|---|
| Vertices | 5 |
| Faces | 5 |
Prism
| Edges | 9 |
|---|---|
| Vertices | 6 |
| Faces | 5 |
Tetrahedron
| Edges | 6 |
|---|---|
| Vertices | 4 |
| Faces | 4 |
Cube
| Edges | 12 |
|---|---|
| Vertices | 8 |
| Faces | 6 |
Ask an adult if they would like to share a photo
of your shapes on Twitter
If they are happy to do this please ask them to include @knextgen