动点问题是数学中的难点,动点相似问题是相似形中的难点1为了更好地掌握这一难点,现举例说明如下:图1例1如图1,在矩形ABCD中,AB=12厘米,BC=6厘米1点P沿AB边从A点开始向点B以2厘米/秒的速度移动;点Q沿DA边,从点D开始向点A以1厘米/秒的速度移动1如果P,Q同时出发,用t表示移动的时 The dynamic point problem is a difficult point in mathematics. The similarity point of moving points is a difficult point in similarity. In order to better grasp this difficulty, the following example is illustrated as follows: Figure 1 Example 1 In Figure 1, in the rectangular ABCD, AB = 12 Centimeters, BC=6 centimeters 1 point P moves along point AB from point A to point B at 2 centimeters per second; point Q moves along the side of DA, starting from point D to point A at 1 centimeter per second 1 If P, Q start at the same time, use t to represent when moving