The definition provided in the question refers to the Perpendicular Transversal Theorem about lines, as stated in option D and further explained below.
<h3>What is the Perpendicular Transversal Theorem about?</h3>
Imagine we have two parallel lines in a plane. Now, we draw another line that is perpendicular to one of them. According to the Perpendicular Transversal Theorem, this line will be perpendicular to both lines, since they are parallel.
The explanation above is the same as the definition provided in the question. Therefore, we can conclude that the correct answer is Perpendicular Transversal Theorem, option D.
Learn more about parallel lines here:
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