alleryStart learning →What is the angle, in degrees, between the hour hand and the minute hand of a clock showing 9:00 a.m.?
A0 degrees
B45 degrees
C90 degrees
D180 degrees
Answer & Solution
Correct answer: C. 90 degrees
1. At 9:00, the hour hand sits at the 9, which is 270 degrees clockwise from 12.
2. The minute hand sits exactly at the 12, or 0 degrees.
3. The smaller angle between them is 360 - 270 = 90 degrees.
_Source: OpenStax Physics (CC BY 4.0), Ch 6 "Circular and Rotational Motion", section 6.1 Angle of Rotation and Angular Velocity_
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