How do you fold a rectangle into a regular pentagon?
At some point a while back (possibly in a book) I ran into the question "how do you fold a rectangular strip of paper into a regular pentagon?" In this video I pose the question, give you a chance to figure it out for yourself, and then demonstrate a solution. Can you fold a rectangle into a pentagon? Try it out! As an added challenge, can you prove that your folding method really did create a regular pentagon? Discuss in the comments if you think you can prove it!