Question

if one angle formed by a transversal intersecting parallel lines is 65 degrees, what is the measure of its vertical angle?
a. 120 degrees
b. 115 degrees
c. 180 degrees
d. 65 degrees

Explanation:

Step1: Recall vertical - angle property

Vertical angles are congruent.

Step2: Identify given and required angles

Given one angle is 65 degrees. Its vertical angle has same measure. So the measure of the vertical angle is 65 degrees.

Answer:

D. 65 degrees