
Concept explainers
To prove that if a line is perpendicular to one of two parallel lines, then it is perpendicular to the other.

Explanation of Solution
Here l is parallel to m.
Now we can say that angle 1 is a right angle
Now we can say that angle 1 is congruent to angle 2 as they are corresponding
Thus all angles are
Chapter 3 Solutions
Geometry, Student Edition
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