Question

Using the drawing, how would you classify angles 9 and 10?

Answer 1

They are both acute angles and both at 45 degrees 

Answer 2

Adjacent angles

Explanation:

we know that

Adjacent angles are two angles that have a common side and a common vertex (corner point), and don't overlap

In this problem

The common side is the segment DB and the common vertex is vertex B

therefore

the answer is

∠9 and ∠10 are adjacent angles

Note

The problem does not specify that the figure ABCD is a rectangle, but if it were, the angles would also be complementary