I have a strip of paper with parallel sides, a pencil and a straight edge.
How can I construct a regular pentagram (star) with these? And for that matter, a pentagon? Well ... the pentagon is the proper way to go.
(In reply to
A trick by Brian Smith)
brianjn,
Is this the solution intended? If not, please advise that you are interested in a solution that does not require folding (or some other useful constraint).
--- SK
P.S. Brian Smith, where'd you first observe this "trick", and in what context?
P.P.S. And all, who wishes to 'prove' that the method works, and that the only requirement is that a particular ratio (the one found by fwaff, here, is met?
re: A trick
