Answer: Refer to the drawing below
Step-by-step explanation:
Complementary angles always add to 90 degrees.
Draw a right angle, aka 90 degree angle. Plot points A, B and D on it as shown below. Then add point C somewhere inside the rectangular region formed by this right angle. Lastly, connect a segment from B to C. This helps form angles ABC and CBD. Note how these smaller angles combine to a 90 degree angle.
(angleABC) + (angleCBD) = angle ABD = 90 degrees
The angles are adjacent because they share a common wall, which in this case is segment BC.