Question

If points A(-2,1), B(a,0), C(4,b) and D(1,2) are the vertices of a parallelogram ABCD,
find the values of a and b.

Answer 1

Answer:

(4-2)/2 =(a+1)/2

2=a+1

a =1

(1+b)/2=(0+2)/2

1+b=2

b=1