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Force and motion

Force and Motion

The Angle-fold Computer

Students may want to know more about angle-folds. Some questions that might come up are:

  • How can I get the angle- fold to rise higher off the page?
  • If I assemble it unfolded, how can I predict where it will make the fold line?
  • Does an angle-fold follow rules like the parallel-fold, such as A + B = C + D (see Lesson 5)? To answer these questions, there are three videos you can see below. * The first video introduces the four angles A, B, C, and D, which play almost the same role as the link lengths A, B, C, and D for a parallel-fold.
  • To measure these angles requires protractors. The next video provides instructions about how to assemble the Angle-Fold Computer Template, which has protractors printed on it.
  • The third video demonstrates an experiment using the Template, which leads to the conclusion that A + B = C + D, just like with the Parallel-fold. The only difference is that in an angle-fold, A, B, C, and D are all angles, while in the parallel-fold they are lengths.