Answer:
The answer x+ y +z +w = 360
Step-by-step explanation:
ABCD is rectangle or we could say two parallel lines.
Sum of angles in a straight = 180
So, x+120 = 180 => x = 60
Similarly, 80+y = 180 => y = 100
Also 60 + z = 180 => z = 120
Also we know that, sum of opposite angles in a rectangle = 180
80 + <ADC = 180 => <ADC = 100
Again, Sum of angles in a straight = 180
So, w+100 = 180 => w = 80
Now x+y+z+w = 60 + 100 + 120 + 80
= 360