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[" 6.Infig."9.25" ,diagonals "AC" and "B...

[" 6.Infig."9.25" ,diagonals "AC" and "BD" of quatililiteral "],[" ABCD intersect to such that "OB=OD," " "],[" IfAB "=CD" ,then show that: "],[" (i) ar "DOC" ) ar(AOB) "],[" (iii) Dar DCB ar "ACB" ) "],[" (iii) DAICB orABCD isaparalllogram."],[" IHint: From D and B,draw perpendiculars to AC."],[" Wherem 9.2"],[" on both sides) "," ar Dad E are points on sides AB and AC respectively of "Delta ABC" such "],[," arring "C=" ar (BC) Provethat DEIIBC."]

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