From question 64 we learned that an hour hand of a clock moves 30 degree in one hour. At 4:30, the hour hand of the clock has moved 135 degree. (4.5 × 30 = 135) At 4:30, the minute hand has moved 180 degree. So, the angle between hour and minute hand of the clock equals: 180 – 135 = 45 degree
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