Question

in which diagram are angles 1 and 2 vertical angles?

Explanation:

Step1: Recall vertical angles definition

Vertical angles are formed by two intersecting lines and are opposite each other, equal in measure.

Step2: Analyze each diagram

• Top - left: Angles 1 and 2 are complementary (right angle), not vertical.
• Top - right: Angles 1 and 2 are opposite (formed by two intersecting lines), so vertical.
• Middle: Angles 1,2,3 with a straight line, not vertical angles between 1 and 2.
• Bottom: Angles 1 and 2 are adjacent on a straight line, not vertical.

Answer:

The Top - Right Diagram