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 K'NEX rods

and

plasticine, marshmallows or Blu Tac instead of K'NEX connectors

Before you start, it will help you to look at this hint from the K'NEX User Group

Challenge 1: Build a pyramid

(also called 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

Wite these numbers on your record sheet if you downloaded one

Challenge 2: Build a prism

Hint: you will have to bend the grey rods slightly

to make them fit into the connectors

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 4: Can you build a cube?

 

You may need more K'NEX or straws/spaghetti/pencils/plasticine/

Blu Tac/marshmallows

Photo of a red dice

Count the number of edges, vertices and faces

and write them on your record sheet

 

 

Ask an adult to share a photo of your 3D shapes on Twitter and include: #LockdownLessons

@knextgen

Great work!

Answers

  Pyramid Prism Tetrahedron Cube
Edges 8 9 6 12
Vertices 5 6 4 8
Faces 5 5  4  6
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