Answer by Florian F for Touching Matchsticks
Here is a more symmetrical solution, not minimal though.PS: That solution was also given there: Touching matchsticks with compass and straightedge
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Answer by supercat for Touching Matchsticks
An arrangement which can be readily seen to be valid albeit not minimal may be formed by observing that joining two "small" (3-matchstick) triangles and two "large" (9-matchstick) rigid triangles will...
View ArticleAnswer by Ivo for Touching Matchsticks
I must admit that I found It with google but this is the solution:
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Touching Matchsticks
You are asked to place matchsticks on a flat surface such that each matchstick end meets three others, and no matches cross. It is easy to achieve this for patterns that extend indefintely:The...
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