Answer :
Let the angle be X degree.
Then it’s supplement is (189-X) degree
Given that , Angle - supplement = 30
Or , X- 180-x)=30
or , X- 180 + X = 30
2X - 180 = 30
X=30+180/2
X=210/2
X=105
Now ,
180-X=180–105=75
Hence , the angles are 105 and 75 degrees.
Then it’s supplement is (189-X) degree
Given that , Angle - supplement = 30
Or , X- 180-x)=30
or , X- 180 + X = 30
2X - 180 = 30
X=30+180/2
X=210/2
X=105
Now ,
180-X=180–105=75
Hence , the angles are 105 and 75 degrees.