Utsav

[Utsav @utsav123321]

@akhoon_faheem @pickover It is not mentioned that these lines are parallel.

[Utsav @utsav123321]

@pickover By angle sum property, third angle of the bottom triangle will be 80. And by again angle sum property, the third side of the smaller triangle will be 30. And now subtract 30 from 180 which is Equal to 150.

The final answer is 150 degrees