Question

you have answer then give me​

Answer 1

Step-by-step explanation:

in∆ADC

y= 180-120=60(sum of coplymatory angle is 180)

90+x+y=180

90+60+x=180

x=180-150=30

in∆ABC

x+y+z=180

30+60+z=180

z=180-90

z=90