Answer:
Explanation:
angle y +60 = 180 degree (being adjacent angles of a trapezium )
angle y =180 - 60
angle y =120 degree
angle x+30 degree = 180 degree (being opposite angles of a trapezium)
angle x =180 - 30
angle x=150 degree
75 + 145 + 90 + y = 360 degree (sum of angles of a quadilateral is 360 degree)
310 + y = 360
y = 360 - 310
y = 50 degree