The line 3x + 2y + 7 = 0 and 6x + 4y + 9 = 0 are `"___________"` to each other .

If the lines 3x - 4y + 4 = 0 and 6x - 8y - 7 = 0 are tangents to a circle, then find the radius of the circle.

The lines 3x - 4y + 4 = 0 and 6x - 8y - 7 = 0 are tangents to the same circle. The radius of the circle is :

The lines 3x - y + 2= 0 and x + 3y + 4 = 0 intersect each other in the line "_______" .

If perpendicular distance between lines 3x + 4y + 10 = 0 and 6x + 8y + k = 0 is 7/2 unit then k = ........

Find the distance between 3x + 2y + 7 = 0 and 6x + 4y + 3 = 0.

If lines 3x - 4y + 4 = 0 " and " 6x - 8y - 7 = 0 touch the same circle , then its radius is

Show that lines x-2y-7=0 and 2x-4y+15=0 are parallel to each other.

The lines 3x-4y +4=0 and 6x-8y-7=0 are tangents to the same circle. The radius of the circle is