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

If a line is perpendicular to the line 5x $$-$$ y = 0 and forms a triangle of area 5 sq units with coordinate axes, then its equation is

The three lines 4x + 4y = 1, 8x $$-$$ 3y = 2, y = 0 are

The line 3x + 4y $$-$$ 24 = 0 intersects the X-axis at A and Y-axis at B. Then, the circumcentre of the $$\Delta$$OAB, where O is the origin, is