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A Common Vertex (Posted on 2004-07-12) Difficulty: 2 of 5
Three regular polygons, all with unit sides, share a common vertex and are all coplanar. Each polygon has a different number of sides, and each polygon shares a side with the other two; there are no gaps or overlaps. Find the number of sides for each polygon. There are multiple answers.

See The Solution Submitted by Brian Smith    
Rating: 3.0000 (1 votes)

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re: solution | Comment 4 of 19 |
(In reply to solution by Thalamus)

Wouldn't an infinite-sided polygon be more like a circle than a straight line?  Of course the angle at any given vertex between two adjacent sides would still essentially be 180º.
  Posted by Sing4TheDay on 2004-07-12 13:23:54

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