Here's why:
* Natural Features: Most state borders are defined by natural features like rivers, mountains, and lakes. These are often more easily identifiable and less prone to change than arbitrary lines on a map.
* Historical Agreements: State borders were established through treaties and agreements between different colonies and later states. These agreements often relied on natural features, historical landmarks, or even the division of land between families.
The 2 states that *do* use latitude and longitude lines for at least part of their borders are:
* Colorado: Its western boundary is defined by the 109th meridian west.
* Utah: Its northern boundary is defined by the 41st parallel north.
Let me know if you'd like more details about specific state borders!