Nets and Folding

Chapters

1. 0:51Squares that touch are never opposite
2. 1:57One square between in a line, or the two ends of a Z: opposite
3. 2:35Two squares crash onto the same face: no cube
4. 2:58The zipper: close the notch, then zip on at three squares
5. 6:50A pattern follows the edge it touches

Methods in this video

• Squares that touch are never opposite

  The question tells you which faces are opposite (for example, opposite faces of a dice add up to 7) and asks which net or cube is correct, and in each wrong option two faces that should be opposite are touching.

• One square between in a line, or the two ends of a Z: opposite

  The question shows one net and asks which faces end up opposite each other after folding, or whether two faces are opposite.

• Two squares crash onto the same face: no cube

  The question asks which shape can fold into a cube, or whether adding one more square makes a cube net.

• The zipper: close the notch, then zip on at three squares

  The question asks which corners come together, or which two edges join into one edge, once the net is folded.

• A pattern follows the edge it touches

  The faces of the net carry patterns that point a certain way (such as half-shaded triangles or arrows), and the question asks which cube matches after folding.