求英文高手!解题目意思!
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求英文高手!解题目意思!
(a) After running for 10 minutes, find the size of the angle in degrees made by
(i ) the minute- hand
(2) the hour hand
(b)Referring to the figure, find the marked angle between the minute-hand and the hour-hand at 10:10.
求解释,及做题方法.(图是自己画的,可能不太好.)
(a) After running for 10 minutes, find the size of the angle in degrees made by
(i ) the minute- hand
(2) the hour hand
(b)Referring to the figure, find the marked angle between the minute-hand and the hour-hand at 10:10.
求解释,及做题方法.(图是自己画的,可能不太好.)
![求英文高手!解题目意思!](/uploads/image/z/603230-14-0.jpg?t=%E6%B1%82%E8%8B%B1%E6%96%87%E9%AB%98%E6%89%8B%21%E8%A7%A3%E9%A2%98%E7%9B%AE%E6%84%8F%E6%80%9D%21)
It's easy. The angle is composed of 2 angles, one is from 12 to 3 , that is 360*2/12=60 degrees, the other is from the hour hand direction to 12, that is 60-30*2/12=55 degrees. So, the angle is 60+55=115 degrees.