The Mathematical Tourist: Riding on Square Wheels
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Hands-On Math Lessons (No Homework Required) - The New York Times
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Square Wheels: Engineering & Design Science Activity
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How do you ride a square-wheeled tricycle?
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The Lessons of a Square-Wheeled Trike
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More on Square Wheels - SciencetoyMaker
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Times Square Ferris wheel: 110-foot tall ride offers sky-high views of New York City landmark - ABC7 Chicago
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6,738 Bike Square Wheels Royalty-Free Images, Stock Photos & Pictures
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The Brief History of the Ferris Wheel, History
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Square Wheels: Engineering & Design Science Activity
The Mathematical Tourist: Triking Around
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Formula for fun: NYC museum finds math everywhere
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Riding on Square Wheels
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National Museum of Mathematics
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The Lessons of a Square-Wheeled Trike