Final answer:
The pusher slide is normally used at an angle of approximately 30-45 degrees when making a routine blood smear.
Step-by-step explanation:
When making a routine blood smear, the pusher slide is normally used at an angle of approximately 30-45 degrees. This angle allows for smooth and even spreading of the blood sample on the slide. Using a pusher slide at the correct angle helps ensure that the blood cells are distributed evenly and the slide is properly prepared for microscopic examination.