Answer: [tex]y=90\°[/tex]
Step-by-step explanation:
Based on the description given in the exercise, you can draw the horizontal lines "e" and "f" cut by the vertical lines "a" and "b".
By definition, when a horizontal line and a vertical line intersect each other, the angle formed by this intersection measures 90 degrees.
A "Right angle" is defined as an angle that measures 90 degrees.
Therefore, if a vertical line intersects a horizontal line, you can say that they are perpendicular.
You can observe in the image attached that the vertical lines "a" and "b" cut the horizontal lines "e" and "f". Therefore, since [tex]a||b[/tex] and [tex]e||f[/tex], all the angles formed by this intersections measure 90 degrees.
Therefore, you can conclude that:
[tex]y=90\°[/tex]
