Can you find the quadrilateral formed by the lines a x b y c = 0, a dash x b = 0, x b y c = 0, and a dash x b dash y c = 0? If the diagonals of this quadrilateral are perpendicular, what can you conclude about these lines?
a. The quadrilateral is a rectangle
b. The quadrilateral is a rhombus
c. The quadrilateral is a square
d. The quadrilateral is a parallelogram