Angles bae and fac are straight angles. what angle relationship best describes angles bac and dac?
adjacent angles
complementary angles
supplementary angles
vertical angles

step-by-step explanation:

the angles look like they are complementary. without more information, you cannot be sure that they are.   so the two angles may or may not add up to 90o. since you can't be sure, don't choose b

the angles certainly are not supplementary. they don't look like they add up to 180 degrees. and they are not marked in a way that would tell you that.

they are not vertically opposite. for one thing they are not equal which vertically opposite angles are.

the only suitable answer is a adjacent angles -- not a really common term, but nothing else works.

answer:

the answer should be supplementary angles.