| Barcelona41 | The shape of this arch is a catenary curve, which is the shape a chain has when suspended from 2 points. It is different from a parabola. The St. Louis Gateway Arch uses the same shape. |
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| Barcelona41 | The shape of this arch is a catenary curve, which is the shape a chain has when suspended from 2 points. It is different from a parabola. The St. Louis Gateway Arch uses the same shape. |
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