What is the angle between the hour and minute hand at 3:15?

What is the angle between the hour and minute hand at 3:15?

Approach: Calculate position of hour hand relative to 3.

7.5 degrees. Minute hand at 90 deg. Hour hand moved 15/60 of 30 deg = 7.5 deg.

Follow-up: What is the angle at 3:30?

Key concepts: angular velocity.