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A flat ball? (Posted on 2004-04-08) Difficulty: 2 of 5
Soccer balls are usually covered with a design based on regular pentagons and hexagons.

How many pentagons/hexagons MUST there be, and why?

See The Solution Submitted by Federico Kereki    
Rating: 3.7500 (4 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Some ThoughtsSoccer ballsbroll2016-04-16 02:38:46
An interesting link (non-regular)Jer2004-05-03 09:43:05
re(2): Johnson solidsJer2004-04-27 14:24:22
re: Johnson solidsThalamus2004-04-15 12:32:08
Johnson solidsJer2004-04-15 12:03:24
re(3): The 720 degree deficitTristan2004-04-13 16:36:27
re: A related question...Brian Smith2004-04-13 14:26:51
Hints/TipsA related question...SilverKnight2004-04-13 12:20:41
Questionre(3): The 720 degree deficit - Euler's formulaSilverKnight2004-04-12 12:48:21
Solutionre(2): The 720 degree deficitTristan2004-04-12 10:32:31
re(2): The 720 degree deficit - Euler's formulaBrian Smith2004-04-12 10:26:10
re: The 720 degree deficitJer2004-04-12 09:47:25
Pentagons and HexagonsBrian Smith2004-04-12 09:15:46
The 720 degree deficitLarry2004-04-09 19:34:23
The 720 degree deficitLarry2004-04-09 19:34:19
Some ThoughtsSo far, no cigar...Federico Kereki2004-04-09 18:51:00
re(2): Hint in the title?Jer2004-04-09 14:10:40
re: Hint in the title?Brian Wainscott2004-04-09 13:06:20
Hint in the title?Jer2004-04-09 09:37:29
SolutionBend it like BeckhamPenny2004-04-08 16:13:08
SolutionanswerBilly Bob2004-04-08 15:37:57
Solutionre: My thoughtsThalamus2004-04-08 15:30:20
Some ThoughtsMy thoughtsBryan2004-04-08 15:28:25
Some ThoughtsMy thoughtsBryan2004-04-08 15:26:09
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