Question

4. Find the value of x.
40
50
80
60

Answer 1

the answer should be x=50

Answer 2

Explanation:

Sum of all the angles of a quadrilateral = 360

40 + 110 + 80 + y = 360

230 + y = 360

y = 360 - 230 = 130

x and y are linear pair

x + y = 180

x + 130 = 180

x = 180 - 130

x = 50