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According to the theory of Plate Tectonics and Pangaea, the east coast boundaries were once connected to the west coast boundaries of Africa, Europe, and parts of north-western Asia. The irregularity of the east coast of the Americas as well as the west coast of the respective continents were caused by the "tearing" of one land mass from the other, an action which did not happen on the west coast resulting in a straighter more regular west coast.

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Q: Why are the east coast boundaries shaped irregular and the west coast are made of more straight lines?
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Are the edges of the continent are the same as boundaries of plates?

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Are the edges of continents the same as the boundaries of plates?

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Are the edge of continents the same as the boundaries of plates?

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Are the edges of continents are the same as the boundaries of plates?

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