Question

If the points A(-2,-1),B(1,0),C(a,3) and D(1,b) form a parallelogram,find the values of a and b.

Answer 1

distance b/w AB. = CD

distance b/w BC = AD

distance formula.

Answer 2

Do not consider the scribbled portion.

As it's a parallelogram then it's diagonal will bisect.

Use mid point formula

X=X1+X2/2

Y=y1+y2/2