Question

find the measure of ∠1 in the figure, shown to the right. m∠1 = □°

Explanation:

Step1: Identify angle - relationship

Since the two horizontal lines are parallel, ∠1 and the angle marked 85° are corresponding angles.

Step2: Apply corresponding - angles property

Corresponding angles formed by parallel lines and a transversal are congruent. So m∠1 = 85°.

Answer:

85