The distance from a point to a straight line, that is, the distance from the point to the vertical line of the target straight line. Consider the point (x0, y0, z0) and the spatial straight line x-x1/l = y-Y 1- 0//m = z-z1/n, where d=|(x 1-x0, y/kloc). +m？ +n？ )。
The distance formula between two points is often used to find the distance between two points and the coordinates of points in a function diagram, and it is one of the distance formulas. The distance formula between two points describes the relationship between points and the distance between points.
By deducing the formula of the distance from point to straight line, students' understanding of the combination of numbers and shapes is improved, and their consciousness of dealing with "graphics" with "calculation" is deepened. Convert the distance relationship between two parallel straight lines into the distance between points and straight lines.
The minimum value of the distance from point P to any point on a straight line is the distance from point P to a straight line. Take the formula of the distance between two points at any point in the world as, in order to deform it with conditional expression, the matching coefficient is treated as: if and only if the equal sign is taken, the minimum value is.
The benefits of learning mathematics:
1. Mathematics is the foundation of all sciences, and all major scientific and technological progress is closely related to mathematics. Without mathematics, there would be no computers, televisions and space shuttles, and there would be no such colorful life today.
2. Mathematics is a tool discipline, which is the basis of learning other disciplines and also a discipline to improve people's judgment, analysis and understanding.
Mathematics is not only a science, but also a universally applicable technology. It is the door and key to science. Learning mathematics is a very important measure to make oneself rational, and mathematics itself has its fun.
4. Mathematics can make you think about any problem more carefully without being confused. It can also make your brain react flexibly and deal with emergencies more rationally.