Question

sorry about the drawing but please answer...​

Answer 1

Step-by-step explanation:

30+90+X=180

120+X=180

X=180-120

X=60

angle y =90-60

y=30

angle d =90

angle a=90+60=180

150-180=30

angle a =30

hope it help

Answer 2

Answer:

In angle DBC,

B=90/2=45°

DBC+BCD+CDB=180°

45°+30°+CDB=180°

75°+CDB=180°

CDB=180°-75°

CDB=105°