Question

What is a requirement of adjacent angles?

Adjacent angles must be vertical.
Adjacent angles must be supplementary.
Adjacent angles must share a vertex.
Adjacent angles must share interior points.

Answer 1

Adjacent angles must share a vertex.

Im so sorry I am so late on answering this question....

Hope the answer (my answer) helps!

Answer 2

Adjacent angles must share a vertex.

Explanation:

we know that

Two angles are Adjacent when they have a common side and a common vertex

therefore

Adjacent angles must share a vertex.