Question

angles 1 and 3 are ______?
right
supplementary
complementary
vertical

Explanation:

Step1: Recall angle relationships

Vertical angles are opposite angles formed by two intersecting lines. They are equal in measure. Supplementary angles add up to \(180^\circ\), complementary add up to \(90^\circ\), and right angles are \(90^\circ\).

Step2: Analyze angles 1 and 3

Angles 1 and 3 are opposite each other when two lines intersect. So they are vertical angles.

Answer:

vertical (the option corresponding to "vertical")