Answer :
The letter of another angle that has the size 125° is "b" because it is vertically opposite to 125°
How to identify congruent angles?
From the attached image, we see that;
RS and TU are parallel lines.
PQ is a straight line.
Now, vertically opposite angles are defined as the angles formed which are opposite each other when two lines meet at a point.
Now, from the given image, we can say that another angle of size 125° will be b. This is because b is vertically opposite to the angle 125°
Therefore we conclude that the letter of another angle that has the size 125° is "b" because it is vertically opposite to 125°
Read more about Congruent Angles at; https://brainly.com/question/14791175
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