Suppose i have a circle whose mid point is given by $(X,Y)$ where $X$ and $Y$ represent longitude and latitude. The radius of the circle is 1 KM.
Now If i have line given by $(X_1,Y_1)$ and $(X_2,Y_2)$ where $X_1$,$Y_1$ represents begin longitude,latitude and $X_2$,$Y_2$ represent final longitude and latitude.
How can i compute if the line intersects the circle? Radius of the circle is in KM.