Question

triangle abc is a right triangle.
what is the relationship between angles a and b?
○ they are congruent.
○ they are complementary.
○ they are supplementary.
○ there is no relationship between them.

Explanation:

Step1: Recall complementary angle definition

Two angles are complementary if their sum is $90^\circ$.

Step2: Calculate sum of angles A and B

$\angle A + \angle B = 59^\circ + 31^\circ = 90^\circ$

Step3: Match to angle relationship

Since their sum equals $90^\circ$, they fit the complementary definition.

Answer:

They are complementary.