Question

a-
then Find the
3+ /
If
Value of 2+1
2
92​

Answer 1

Answer:

Consider the given points A(1,−2),B(2,3),C(0,2) and D(−4,−3)

Since ABCD form a parallelogram, the midpoint of the diagonal AC should coincide with the midpoint of BD.

Mid point of AC= Mid point of BD

[21+a,2−2+2]=[22−4,23−3]

[2a+1,0]=[2−2,0]

Since the mid points coincide, we have

21+a=a

⇒a+1=−2

⇒a=−2−1

⇒a=−3