Question
In figure, state Which lines are parallel and why.
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Answer
Vertically opposite angles are equal$\Rightarrow\ \angle\text{EOC}=\angle\text{DOK}=100^\circ$
$\Rightarrow\ \angle\text{DOK}=\angle\text{ACO}=100^\circ$
Here two lines EK and CA cut by a third line and the corresponding angles to it are equal Therefore, EK || AC.
$\Rightarrow\ \angle\text{DOK}=\angle\text{ACO}=100^\circ$
Here two lines EK and CA cut by a third line and the corresponding angles to it are equal Therefore, EK || AC.
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