Respuesta :
The angles a and b are complementary in the fact that they will add up to 90 degrees.
Answer:
B. complementary angles
Step-by-step explanation:
Vertical angles:
Two angles opposite of each other when 2 straight lines intersect. These are always congruent.
Complementary angles:
Two or more angles that add up to 90 degrees.
Supplementary angles:
Two or more angles that add up to 180 degrees.