Question
In the given figure,

AB || DC prove that
$\triangle\text{DMU}\sim\triangle\text{BMV}$

Answer

Given, AB || DC In triangle DMU and BMV, we have $\angle\text{MUD}=\angle\text{MVB}$ Each angle is equal to 90° $\angle\text{UMD}=\angle\text{VMB}$ Each are vertically opposite angles. Therefore, by AA-criterion of similarity $\triangle\text{DMU}\sim\triangle\text{BMV}$

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