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The Arch was invented by the Romans. It makes a very sturdy construction, while making it lighter, and using less materials than the standard way of building. The weight of the story above resting on the top of the arch is transferred down each leg to the ground, instead of pressing on the lower story. The Arch is also what makes a Dome. Just think of 360 arches running through a common point at the top. The entire weight of the Dome is transferred to the walls of the building, and down into the ground.

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16y ago

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