If two straight lines intersect and one angle is 30 degrees what are the other three angles

Well when 2 lines intersect, there are 4 angles. The opposite angles are the same degrees. Since one angle is 30 degrees, the opposite angle is 30. So 30+30 is 60. Now all the 4 angles added up should be 360 degrees. So 360-60 is 300. Now 300 divided by 2 is 150 so the other 2 angles are 150 degrees.

Easey peasy

oposite angle is equal

other angles are supplementary (supplementary means add to 180, and a straight line=180 so if you look at 2 lines intersecting and think for a little bit, you wiill see why)

oposite angle=30

other angle is adds to 180

30+other=180

subtract 30

other=150

other is oposite other other

other=other other

150=other other

angles are

150,30,150