Alternate angles are defined as angles that are on opposite sides of the transversal and between the intersected lines.

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

Answer: (B)

Think about what happens when a transversal crosses two lines. The angles that lie between those two lines and are on opposite sides of the transversal form a matching pair known as alternate interior angles. The statement describes exactly that situation, so the term used for these angles is alternate angles (often called alternate interior angles).

Corresponding angles are on the same side of the transversal with one interior and one exterior angle in corresponding positions, so they aren’t between the lines. Vertically opposite angles are across from each other at a single intersection, not involving a transversal crossing two separate lines. The transversal line itself is just the line that cuts through, not an angle type.