Use a protractor to draw an angle of 55 degree that opens from the left. then draw an angle of 125 degree that opens from the right .how do the angles apper to be related?

You should first draw a strait line across your paper. Draw the 55 degree angle with your protractor. Then draw the 125 degree angle it should stop at where the line of the 55 degree angle you just drew. These two angles add up to 180 degrees. 125+55 = 180. These are known as supplementary angles.