Question

question 7 of 10
vertical angles must:
check all that apply.
a. have the same vertex.
b. be congruent.
c. be a linear pair.
d. be adjacent.

Explanation:

Vertical angles are formed when two lines intersect. They share the same vertex. Also, vertical - angle theorem states that vertical angles are congruent. A linear pair of angles are adjacent and supplementary, and vertical angles are not adjacent or a linear pair.

Answer:

A. have the same vertex.
B. be congruent.