In fig., given that angle AOC= angle ACO and angle BOD=angle BDO. Prove that
AC || DB
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⏩ Given:-
* angle AOC= angle ACO
* angle BOD = angle BDO
⏩ T.P:- AC || DB
⏩Sol. :-
We have,
angle AOC = angle ACO and angle BOD= angle BDO
But,
angle AOC = angle BOD [Vertically opposite angle ]
Therefore,
angle ACO = angle BOD and angle BOD= angle BDO
=> angle ACO = angle BDO
→ Thus, AC and BD are two lines intersected by transversal CD such that angle ACO = angle BDO i.e. alternate angles are equal.
Therefore, AC || DB. [Hence proved]
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