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 Regular Pentagon (Classic) (Posted on 2003-05-15)
Show, how given a distance r, one can construct a regular pentagon, whose circumradius is r, using only ruler and compass...

Note 1: The ruler doesn't have any marks, so it's no good for measuring. It's only good for joining 2 points by a line.

Note 2: The circle which circumscribes the polygon, such that the polygon lies entirely within the circle and all of whose vertices lie on the circumference of the circle is the circumcircle of the polygon. The radius of this circle is the circumradius of the circle.

 See The Solution Submitted by Fernando Rating: 3.0000 (5 votes)

 Subject Author Date Solution Antonio 2003-08-31 03:43:05 If you really want a challenge ... Brian Smith 2003-05-23 15:13:01 re: A small hint Bryan 2003-05-18 17:58:45 Solution Charlie 2003-05-17 09:08:11 re: A small hint DJ 2003-05-17 07:35:46 A small hint Fernando 2003-05-17 06:29:37 Der.. DJ 2003-05-17 00:48:25 Cheesy attempt DJ 2003-05-17 00:05:36 Clueless DJ 2003-05-16 23:59:05 re(3): Solution Bryan 2003-05-16 06:37:20 re(2): Solution Ravi Raja 2003-05-16 04:32:39 re: Solution Charlie 2003-05-16 03:20:26 Solution Ravi Raja 2003-05-15 19:16:22 my mistake ethan 2003-05-15 13:12:10 answer, i hope ethan 2003-05-15 13:07:33 No Subject Gamer 2003-05-15 09:50:43 No help here Bryan 2003-05-15 09:42:07

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