Hi,there are three ways to cut a heptagon from a square. Is it true that the first one listed here is mathematically exact? What about the other 2 methods, are they "pretty good" or are they "very good" estimates of a true heptagon: http://www.britishorigami.info/practical/highlite/140-49.php#146
https://cms.math.ca/crux/v23/n2/page81-88.pdf http://www.oriwiki.com/origamidennis/diagrams/Heptagon.gif Thanks in advance, Diana
