Question

what are vertical angles? angles that are opposite of each other when lines intersect angles that add up to 90° angles that add up to 180° angles that are adjacent to each other

Explanation:

Vertical angles are formed when two lines intersect. They are opposite each other. Angles that add up to \(90^{\circ}\) are complementary, those that add to \(180^{\circ}\) are supplementary, and adjacent angles share a side.

Answer:

Angles that are opposite of each other when lines intersect.