Question

in the given measure of​

Answer 1

$\sf\large{\underbrace{\blue{Option \:(a) \:80\degree}}}$

$\sf{\underline{\underline{\green{Reason:-}}}}$

• $\sf{Because\: when \:two \:lines \:crosses,\: the \:angle }$$\sf{opposite \:to \:each \:other\: are \:always\: equal, }$$\sf{\underline{\red{I.e \:Vertically\: Opoosite\: Angles.}}}$