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倾斜角和斜率都是反映直线相对于x轴正方向倾斜程度的,在解析几何里,斜率可以用有向线段数量的比或点的坐标表示出来,在研究直线时,使用斜率比使用倾斜角方便得多。因此,它是研究两条直线位置关系的重要依据,正确地理解斜率的概念,熟练地掌握斜率公式,巧妙地应用斜率公式,对解直线方面的习题可达到意想不到的效果,也是学好直线这一章的关键
Both the tilt angle and the slope reflect the inclination of the line relative to the positive direction of the x-axis. In analytical geometry, the slope can be expressed as the ratio of the number of directed segments or the coordinates of the points. When studying a straight line, use the slope ratio to use the tilt angle. Much more convenient. Therefore, it is an important basis for studying the positional relationship between two straight lines. Correctly understanding the concept of slope, mastering the slope formula, and skillfully applying the slope formula, can achieve unexpected results in solving straight-line exercises. It is also a good way to learn straight lines. The key to the chapter