Question

钟表上的分针绕其轴心旋转，分针经过15分钟后，分针转过的角度是______

钟表上的分针绕其轴心旋转，分针经过15分钟后，分针转过的角度是______．

Answer 1

∵时钟上的分针匀速旋转一周的度数为360°，时钟上的分针匀速旋转一周需要60分钟， 则时钟上的分针匀速旋转一分钟时的度数为：360÷60=6°， 那么20分钟，分针旋转了15×6°=90°． 故答案为：90°．

Answer 2

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