Question

Pls ans to the ques-54

Answer 1

its simple
 
in square the diagonals are perpendicular to each other

slope of diagonal BD = - coeff of x/ coeff of y in the equation

which equals -1/2
 
therefore slope of other diagonal gonna be 2

as m(AC) * m(BD)= -1
 
 now using slope method to find equation of AC
 
 y-2/x-1 = 2
 
gives y-2x=0

and the point of intersection of two diagonals would be (2,1)

 hope  this assists