Chapter Review
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Consider the Lines Perpendicular to a Transversal Theorem.
x and y are parallel.
Explanation: See solution.
According to the Lines Perpendicular to a Transversal Theorem, lines that are perpendicular to the same line are parallel to each other. In this case, both x and y are perpendicular to the transversal z. Therefore, we can say with certainty that x and y are parallel.