- ABCD is a parallelogram E is the mid point of DC and through D , a line segment is drawn parallel to EB meet CB produced at G and it cuts AB at F. prove that (i)AD = half GC . (ii)DG =2 EB.
Given that: ABCD is a parallelogram and E is the mid-point of CD and EB||DG
To Prove: AD = ½ GC and DG = 2EB
Proof:
(1) In,
Since, E is the mid-point of CD and EB||DG
Therefore by converse of mid-point theorem, B is the mid- point of CG
Thus, CB = ½ CG
And ABCD is a parallelogram, so,
AD=CB
Thus,
AD = ½ GC
(2) In,
E and B are the midpoints of CD and CG respectively
Therefore by mid point theorem,