In the given figure l is parallel to m and m is parallel to n. Find the value of x°. 

Correct option is A

Given:

Given that l is parallel to m and m is parallel to n

​$$\angle BAD = 50^o$$​​

Formula Used:

The interior angles are angles inside the parallel lines on same side of transversal

The sum of interior angles = 180^o

Solution:

When l is parallel to m and m is parallel to n then l is parallel to n

In lines l and n, $$x^o$$​ and $$\angle BAD$$​ are interior angles

​$$x^o + \angle BAD = 180^o$$​​

​$$x^o + 50^o = 180^o$$​​

​$$x= 180^o - 50^o = 130^o$$​​