Question

which picture shows vertical angles?

Explanation:

Vertical angles are formed when two lines intersect. They are opposite each other and have equal measures. In option a, two lines intersect and angles 1 and 2 are opposite each other at the intersection point, which is the definition of vertical angles. Options b, c and d do not show two - line intersections creating opposite angles at the intersection.

Answer:

A. The first picture (where two lines intersect and angles 1 and 2 are opposite each other at the intersection)