Question

question 3 of 10
vertical angles must:
check all that apply.
a. be adjacent.
b. be a linear pair.
c. have the same vertex.
d. be congruent.

Explanation:

Vertical angles are formed when two lines intersect. They share the same vertex and are always congruent. Adjacent angles share a side and a vertex, and vertical - angles are not adjacent. A linear pair is a pair of adjacent angles that form a straight line, and vertical angles are not linear pairs.

Answer:

C. have the same vertex, D. be congruent