Question

fill in the blank ∠11 and ∠10 are
vertical angles
alternate interior angles
linear pair
corresponding angles

Explanation:

Vertical angles are formed when two lines intersect. A linear - pair of angles are adjacent and supplementary. Alternate interior angles are between two parallel lines and on opposite sides of a transversal. Corresponding angles are in the same relative position with respect to parallel lines and a transversal. ∠11 and ∠10 share a common side and their non - common sides form a straight line, so they are a linear pair.

Answer:

Linear Pair