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CBSE Class 10 Answered

the diagonals of aquadrilateral abcd bisect each other at the point osuch that ao/bo=co/do. show th
Asked by | 13 Aug, 2009, 09:09: PM
answered-by-expert Expert Answer

consider triangles AOB,COD

AO/CO=BO/DO...given

now,

angle AOB=angle DOC..Vertically opp angles

so

 triangle AOB similar to triangle COD....SAS rule

angle OAB= angle OCD....corr anglesof similar triangles

so

AD parallel to BC... since alt angles are equal.

ABCD is a trapezium as one pair of opp sides is parallel

 

 

Answered by | 14 Aug, 2009, 08:00: AM
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