Find the value of the unknown x in the following diagrams:

Explanation

Sum of all three angles of a triangle is `180^@`.



(i) `x+50+60 = 180=> x = 180-110 => x = 70^@`



(ii) `x+90+30 = 180 => x = 180-120 =>x = 60^@`



(iii)`x+110+30 = 180 => x = 180-140 => x = 40^@`



...