At 9 PM, the hour hand is at 9 and the minute hand is at 12. If we start at the hour hand and move in a clockwise direction, the angle would be 90°.
Harvey F.
On most clocks the "big hand" is the short but wide hand which is the hour hand. You may be confusing the "long" hand with the "big" hand. The longer hand is the minute hand and is usually thinner than the "big" hand. The correct answer really is 90 degrees!
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03/17/16
Mark M.
If, as you say, we move clockwise from 12 to 9, an angle of 270° is created.
An angle of 90° would be between 12 and 9 in a counterclockwise direction.
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03/17/16
Mel L.
03/17/16