\"\"

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Let \"\" represent interior angle of a regular 23-gon.

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\"\"                (Apply interior angle formula)

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\"\"              (Substitute \"\")

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\"\"                    (Subtract: \"\")

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\"\"                          (Multiply: \"\")

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\"\"                               (Divide: \"\")\"\"

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Since 126 is not a factor of 360,a 23-gon will not tessellate the plane.