1. Describe a simple road map. The trip can be divided into several sections, and described one by one.
2. According to the walking route, determine the observation point, walking direction and distance.
3. When describing the road map, we should first determine each observation point according to the walking route, and then take each observation point as a reference to describe the direction and distance of traveling to the next target, that is, each step should make clear where the starting point is, how far it goes in what direction and where the end point is.
Secondly, it is necessary to determine the starting point of the route formed by segments. So in the process of walking, what is the direction of each segment? The direction it deviates from and the distance it travels determine the stroke of each part. For example, drive 200 kilometers in the direction of 30 degrees northwest.
Finally, the whole road map is formed by linking each described itinerary together.
Another important content of describing a simple road map is to draw a road map according to the requirements. If you want to draw a good road map, you must master the following four steps:
(1) First determine the starting place. That is, the center that forms the starting point.
(2) Specify the positive direction. Which means you're going north.
(3) Draw the scale of distance and actual distance on the map.
(4) Determine the specific location according to the direction and distance. In this process, it is necessary to draw the circuit diagram of each paragraph, and the center of each paragraph is centered on the end point of the previous paragraph.
Especially when drawing every paragraph. In the process of drawing lines, the angles involved in the actual points must be drawn according to the dictionary, and then the lines should be drawn according to the distance.
The key and difficult point of position and direction unit is to describe a simple circuit diagram and learn to draw a simple circuit diagram. There are two steps to solve the problem for everyone. In this process, drawing is the key and difficult point for everyone to learn. In the process of describing and drawing the circuit diagram, students will also feel the extensive application of mathematical knowledge in real life. It will not be boring to learn.