Question

Lines a and b are parallel and lines e and f are parallel.

Vertical and parallel lines a and b are intersected by horizontal lines e and f. At the intersection of lines a and e, the top left angle is angle 1 and the top right angle is angle 2. At the intersection of lines b and e, the bottom left angle is angle 3. At the intersection of lines b and f, the uppercase right angle is angle 4 and the bottom left angle is angle 5.

If m1 = 89°, what is m5?

1
89
91
179

Answer 1

m5 = 89°

Reason: angle 1 is formed by lines a and e, and angle 5 is formed by the parallel lines b and f. Because a || b and e || f, the angle made by a with e equals the angle made by b with f, so m5 = m1 = 89°.