Does the rectangle ABCD have parallel opposite sides? Explain.
•
A. Yes; all sides of the rectangle are in the same plane, and each pair of opposite sides is perpendicular to the same line, so they are parallel.
• B. Yes; they are parallel by the Corresponding Angles Theorem.
• C. No; it is not necessarily true that all four sides are in the same plane.
• D. No; without a transversal we cannot prove that any lines are parallel.
