M2.5.7 For the adult
Solid shapes and nets
Will any 6 squares joined together fold into a cube?
What this chapter teaches
A solid has faces, edges and corners, and you can count them or work them out. A net is a solid laid flat. Not every six squares fold into a cube, because two squares may land in the same place.
Three questions to ask
There is no one right wording. Listen for the idea.
- How could you count the edges of a box without losing your place?
- What shapes are the faces of a triangular prism, and how many of each?
- How would you check, before cutting, whether a net folds into a cube?
After the chapter, the learner can
- Count the faces, edges and corners of a cube and a prism
- Fold a net into an open box
- Match a solid shape to its net
What they copy into their notebook
A cube has 6 faces, 12 edges and 8 corners. A triangular prism has 5, 9 and 6. A net is a solid laid flat. Not every 6 squares make a cube net.