how does the triangulation works based on Grade9 level?
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Triangulation is a powerful method used to find the location of something you cannot easily reach. Imagine you want to find the position of a distant mountain peak or a ship at sea. By using two known locations and measuring angles, you can determine exactly where that unknown point is located. This technique forms a triangle, which is why we call it triangulation.
The first step in triangulation is to establish two known points. These are locations whose exact positions you already know. They could be landmarks like buildings or towers, GPS coordinates, or simply marked points on a map. The key requirement is that you must know the exact distance between these two points. This distance will serve as the baseline for your triangulation calculation.
The second step is to measure angles from each known point to the unknown target. Stand at the first known point and use a compass or protractor to measure the angle between a reference direction, such as North, and your line of sight to the target. Then move to the second known point and repeat the same measurement. These two angle measurements are crucial for the triangulation calculation.
Now comes the exciting part! Draw lines from each known point extending in the direction of your measured angles. Where these two lines intersect is exactly where your unknown target is located. This intersection point, together with your two known points, forms a triangle. This is why the method is called triangulation - you are using the properties of triangles to find unknown locations.
Triangulation has countless real-world applications that affect our daily lives. GPS systems in your phone use triangulation with satellites to pinpoint your exact location. Surveyors use it to create accurate maps. Emergency services use triangulation to locate people in distress. Astronomers use it to measure distances to stars. Even archaeologists use triangulation to map ancient sites. This simple geometric principle is truly one of the most useful tools in science and technology.