A(2,-1),B(a,0),C(4,b) and D(1,2) are the vertices of a parallelogram then the values of a and b are

• diagonals of a parallelogram bisects each other.
  so we can write the x and y co-ordinate of the diagonal intersection as,
  x=(2+4)/2 = (a+1)/2
  => a=5
  y=(-1+b)/2 = (2+0)/2
  => b=3
  
  a=5,b=3
• 10 years agoHelpfull: Yes(1) No(0)