All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Shapes > Geometry
Regular Pentagon (Classic) (Posted on 2003-05-15) Difficulty: 5 of 5
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)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionSolutionAntonio2003-08-31 03:43:05
If you really want a challenge ...Brian Smith2003-05-23 15:13:01
re: A small hintBryan2003-05-18 17:58:45
SolutionSolutionCharlie2003-05-17 09:08:11
re: A small hintDJ2003-05-17 07:35:46
A small hintFernando2003-05-17 06:29:37
Der..DJ2003-05-17 00:48:25
Cheesy attemptDJ2003-05-17 00:05:36
CluelessDJ2003-05-16 23:59:05
re(3): SolutionBryan2003-05-16 06:37:20
re(2): SolutionRavi Raja2003-05-16 04:32:39
re: SolutionCharlie2003-05-16 03:20:26
SolutionSolutionRavi Raja2003-05-15 19:16:22
my mistakeethan2003-05-15 13:12:10
Solutionanswer, i hopeethan2003-05-15 13:07:33
No SubjectGamer2003-05-15 09:50:43
No help hereBryan2003-05-15 09:42:07
Please log in:
Remember me:
Sign up! | Forgot password

Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Copyright © 2002 - 2019 by Animus Pactum Consulting. All rights reserved. Privacy Information