Question

Find x in the following case:

Answer 1

In the figure,

∵ Lines are parallel

∴ ∠1 + 4x = 180° .........(co-interior angles)

But ∠1 = x ........(vertically opposite angles)

∴ x + 4x = 180°

⇒ 5x = 180°

⇒ x =`(180°)/5` = 36°

Hence x = 36°