# geometry

posted by
**Pabitra**
.

If (ad-bc)/(a-b-c+d)=(ac-bd)/(a-b+c-d) then prove that every portion is eqaul to (a+b+c+d)/4

posted by
**Pabitra**
.

If (ad-bc)/(a-b-c+d)=(ac-bd)/(a-b+c-d) then prove that every portion is eqaul to (a+b+c+d)/4