The line is called the directrix. Here we have a vertical directrix, so a parabola sideways from usual.
Geometry is best done with squared distances. The squared distance from an arbitrary point (x,y) to the vertical line x=2 is

We equate that to the squared distance of (x,y) to the focus (-2,0):



We could call that done. A more standard form might be
I agree because when you multiply a positive number such as 1/10 by any negative number the result will always be negative.
(29 m/side)*(2 sides/double)*(3 doubles) = 174 m = 0.174 km
Answer:
sir please give the exact question
Step-by-step explanation:
That what we have to do with these three lines..