CBSE Class 10 Answered
the diagonals of a quadrilateral PQRS intersect each other at point O such that PO/QR=OQ/OS.Prove that PQRS is atrapezium
Asked by Pawan | 24 Aug, 2014, 02:53: PM
Expert Answer
A quadrilateral PQRS whose diagonals PR and QS intersect each other at O such that
To prove : Quadrilateral PQRS is a trapezium
Construction : Draw OT || PQ meeting PS at T.
To prove : Quadrilateral PQRS is a trapezium
Construction : Draw OT || PQ meeting PS at T.
Proof : In PSR, OT || SR....(i)
(By Basic proportionaity theorem)..........(ii)
Also, (Given)...........(iii)
From (ii) and (iii), we get
SR || OT (Converse of Basic proportionality theorem)......(iv)
From (i) and (iv), we get
SR || PQ
Hence quadrilateral PQRS is trapezium.
Answered by Anuja Salunke | 25 Aug, 2014, 10:07: AM
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