Q.5.) ABCD is a parallelograms, E&F are the mid point of
AB and CD respectively. GH is any line intersecting AD, EF, and BC at G, P and H
respectively. Prove that GP=PH..
Q. 6). The diagonal of a quadrilateral ABCD are perpendicular. Show that the quadrilateral, formed by joining the mid point of it's sides, is a rectangle.
Answers
Step-by-step explanation:
Since E and F are mid-points AB and CD respectively.
∴AE=BE=
2
1
AB and CF=DF=
2
1
CD
But, AB=CD
∴
2
1
AB=
2
1
CD⇒BE=CF
Also, BE∥CF [∵AB∥CD]
∴ BEFC is a parallelogram.
⇒BC∥EF and BE=PH ...(i)
Now, BC∥EF
⇒AD∥EF [∵BC∥AD as ABCD is a ∥
gm
]
⇒AEFD is a parallelogram
⇒AE=GP ...(ii)
But, E is the mid-point of AB.
∴AE=BE
⇒GP=PH [Using (i) and (ii)]
solution
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