Answer: it is a
Step-by-step explanation:
Answer:
Complementary angles.
Step-by-step explanation:
Notice that
and
, by given.
, by sum of angles.
, by supplementary angles definition.

Which means,

Therefore,
, in other words, angles a and b are complementary by definition.
Answer:
A minimum of 24 students if all the students share a class with you. Not enough info to decide the largest size of grade.
Step-by-step explanation: