Triangles are really important when it comes to mapping and GPS technology. They help us in city planning by allowing us to build accurate models of different areas.

How We Use Triangles:

1. Triangulation: This method helps us find positions using triangles. Here’s how it works: if we measure angles from three known points, we can figure out where an unknown point is. This is done using rules from geometry, like the Law of Sines or Cosines.

2. Coordinate Systems: When planning a city, we often use a grid to show locations. Each triangle can be placed using points on this grid. For example, if we have points A(1,1), B(4,5), and C(7,2), we can draw triangle ABC to show parts of a city.

3. Area Calculations: Knowing how to find the area of triangles helps in planning spaces for parks or buildings. We can use the simple formula:

   $$\text{Area} = \frac{1}{2} \times \text{base} \times \text{height}$$

   This formula allows planners to quickly figure out how much land will be used.

In short, understanding the properties of triangles makes city planning easier. It helps people see and work with space and locations better.