Question

in the diagram below, lines $overline{ab}$ and $overline{cd}$ are

a. parallel
b. skew
c. perpendicular

Explanation:

Step1: Recall angle - related line properties

If the angle between two lines is 90°, the lines are perpendicular.

Step2: Check the given angle

In the diagram, the angle between lines $\overleftrightarrow{AB}$ and $\overleftrightarrow{CD}$ is 90°.

Answer:

C. perpendicular