1.

The area of the figure formed by the lines ax + by + c = 0, ax – by + c = 0, ax + by – c = 0 and ax – by – c = 0 is

A. \(\frac{{{{\rm{c}}^2}}}{{{\rm{ab}}}}\)
B. \(\frac{{2{{\rm{c}}^2}}}{{{\rm{ab}}}}\)
C. \(\frac{{{{\rm{c}}^2}}}{{2{\rm{ab}}}}\)
D. \(\frac{{{{\rm{c}}^2}}}{{4{\rm{ab}}}}\)
Answer» C. \(\frac{{{{\rm{c}}^2}}}{{2{\rm{ab}}}}\)


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