ax+by+c=0

Find the condition that the diagonals of the parallelogram formed by the lines ax+by+c=0;ax+by+c'=0;a'x+b'y+c'=0,ax+b'y+c'=0 are at right angles.Also find the equation to the diagonals of the parallelogram.

ax + c =0 then x =_________

The directrix and focus of a parabola are x+2y+10=0 and (2,1) respectively then the equation of the tangent at the vertex is ax +by+c= 0 . The area of the triangle formed by the line ax+by+c=0 with the coordinate axes is.

Distance between the parallel lines ax + by +c_1 = 0 and ax + by + c_2 = 0 is

Distance between the parallel lines ax + by +c_1 = 0 and ax + by + c_2 = 0 is

Distance between the parallel lines ax + by +c_1 = 0 and ax + by + c_2 = 0 is

Find the distance between two Parallel lines : ax + by +c_1 =0 and ax + by +c_2 =0 .

If the quadrilateral formed by the lines ax+by+cz=0, ax+b'y+c=0, a'x+by+c'=0, a'x+b'y+c'=0 have perpendicular diagonals, then :