Lesson 0 of 11
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Show on a big screenA die is a solid — a shape with depth. Open a cardboard box out flat. The flat shape is a net. Fold the net back up and the box is whole again.
This is Part II, Chapter 4, Exploring Some Geometric Themes.
What you will learn
- Faces, edges, corners — count the parts of a .
- A net that folds up — six joined squares fold into a cube.
- Nets that fail — most ways of joining six squares do not close.
- Views — the flat shape you see from the front and from above.
- Prisms and pyramids — the counts for any number of sides.
- Fractals — a rule used again and again on its own result. Three examples are the triangle, the snowflake and the carpet.
Each lesson has a lab, apart from the summary and quiz. Tap it or slide it, and watch.