What this lesson shows
A box unfolds into 6 rectangles, a cube into 6 squares, and a square pyramid into a square and 4 triangles. Match each net to the solid it folds into.
The worked example
The lesson works this one step by step: A cube, a box, and a square pyramid. Then your kid tries one like it on paper.
The steps
- A net folds up into a solid
- Cube: 6 squares
- Box: 6 rectangles
- Square pyramid: 1 square, 4 triangles
Helping at home
Cut open an empty cereal box along its edges and lay it flat: that is its net. Count its rectangles, then fold it back up. For a pyramid, start with the base and add a triangle on each side.
If your kid gets stuck
Count the faces, then name each shape.
Watch it with Lux
With Lux, this lesson is a narrated video and a printed page your kid works on. Then Lux helps with the same math on their own worksheet, one question at a time.
More in this unit
- Triangles two ways
- Every name that fits
- Not only the last name
- Solid figures
- Turning does not change it
- Volume by packing cubes
- No gaps, no overlaps
- Volume by formula
- The base is an area
- Find the missing edge
- Two boxes put together
- Area of parallelograms and triangles
- The angles of a triangle
- Area of a trapezoid
- Estimating around a curve
- Radius and diameter
- Perimeter, area, or volume?
- Surface area with a net