Which angles are formed by two lines crossing and are opposite each other?

• A. Alternate angles
• B. Corresponding angles
• C. Transversal line
• D. Vertically opposite angles

Answer: (D)

When two lines cross, they form four angles. The pair that sits directly across from each other at the intersection are called vertically opposite angles. These opposite angles are equal in measure, which is the key property being tested here.

Altogether, this question is asking for the angles that are opposite each other at the crossing, which is why vertically opposite angles are the correct choice. Terms like alternate angles and corresponding angles involve a transversal crossing two lines, and a transversal is the line that cuts across; those describe different angle relationships, not the opposite angles at a single intersection.