• 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,

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