If line AB is perpendicular to line EF, and line CD is perpendicular to EF, then the measure of angle 1=the measure of angle 2. Give an arguement for the statement and a reason for each step.

There is also a diagram drawn on my homework which is a vertical line with two horizontal lines going across. Angle 1 is the interior angle on the right and below the first horizontal line. Angle 2 is the bottom right exterior angle. AB is the first horizontal line. CD is the bottom horizontal line. Point E is on the top of the vertical line and Point F is on the bottom, and together they are line EF

2 answers

sounds like it involves the fact that vertical angles are equal.
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