Question

1. lines a and b are parallel. what is the measure of angle 1?

Explanation:

Step1: Identify angle - relationship

Since lines A and B are parallel, angle 1 and the 135 - degree angle are corresponding angles.

Step2: Apply corresponding - angles property

Corresponding angles formed by two parallel lines and a transversal are equal. So, $\angle1 = 135^{\circ}$.

Answer:

$135^{\circ}$