Do all quadrilaterals with perpendicular diagonals also have all four sides congruent? Explain your answer.

Not all the time. You could have a quadrilateral with sides of different lengths, for example a rectangle. It is classified as a quadrilateral but 2 of its sides are shorter than the other 2.

incomplete question. how do you expect anyone to you when you do not post the question in its entirety?

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )