(D)Prove that opposite sides are congruent and that the slopes of consecutive sides are opposite reciprocals
Step-by-step explanation:
To use coordinate geometry to prove that quadrilateral ABCD is a rectangle. We prove that opposite sides are congruent in order to show equality of the lines.
We also show that the slopes of consecutive sides are opposite reciprocals, this is in order to show that the lines are perpendicular to one another.
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