Gas, Water, Electricity (Geometry and the Imagination)
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|Conway, Doyle, Gilman, Thurston; The Geometry Center|
|A diagram shows three houses, each connected to three utilities. Show that it is impossible to rearrange the connections so that they don't intersect each other. Could you do it if the earth were a not a sphere but some other surface?|
|Levels:||Elementary, Middle School (6-8), High School (9-12)|
|Resource Types:||Lesson Plans and Activities|
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