At 3:20, what is the degree measure of the acute angle formed by the hour hand and the minute hand on a 12-hour analog clock?
I know that the hour hand moves 30 degrees every hour, and the minute hand moves 360 degrees every hour. So, at 3:20, the hour hand is at 3/12 * 360 = 90 degrees, plus 20/60 * 30 = 10 degrees, for a total of 100 degrees from the positive x-axis. The minute hand is at 20/60 * 360 = 120 degrees from the positive x-axis. The acute angle between them is the difference between these two angles, which is 120 - 100 = 20 degrees. 