Answer:

The standard form of a circle is (x - h)^2 + (y - k)^2 = r^2, where (h, k) is the center of the circle and r is the radius.

To find the standard form of the circle enclosing the critical area, we would need to know the coordinates of the center of the circle and the radius. Since each unit on the coordinate plane is equivalent to 1km, we can use the coordinates and the radius to calculate the standard form of the circle.

For example, if the center of the circle is at (3,4) and the radius is 2km, the standard form of the circle would be (x - 3)^2 + (y - 4)^2 = 2^2 = 4 .

So, the equation of the circle will be (x-3)^2 + (y-4)^2 = 4