CBSE NCERT Solutions Chapter 6 Triangles Exercise 6.2 Question 5
5. In fig, DE OQ and DF OR. Show that EF QR.
In POQ, it is given that ED QO.
Therefore, by Basic proportionality theorem (1)
In POR, it is given that DF OR.
Therefore, by Basic proportionality theorem (2)
From (1) and (2), we get
Therefore, by the Converse of Basic proportionality theorem, we can say that EF QR.