A full revolution is equal to 360 degrees. Thus, rotating a quarter of a full revolution would put it at 360/4 = 90 degrees.
Well, there's 360 degrees in a full circle. If the hand moves 1/4 of a complete revolution, divide 360 by 4.
360 รท 4 = 90
The minute hand moved 90 degrees.
The minute hand of a clock moves through 90 degrees when it goes from 3 o'clock to 6 o'clock. This is because each hour represents 30 degrees, and the hand moves through 3 hour increments. Therefore, the total angle is 3 hours times 30 degrees per hour, which equals 90 degrees.
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