I need help on how to do these my teacher didn’t explain it to me

Step-by-step explanation:

on the first one we see that they are outer angles and they are also congruent making the missing angle the same as 66

for the second one if we turn the graph around making the lines how a H shape we see the missing angle and the given angle are in the same line, and we know a straight line makes it 180, so we need to find what the other angle is using the given angle so we subtract from 180, 180-80 = 100

so the missing angle is 100 making it congruent to the other missing angle that was with the 80

for the last one by now we should know what vertical angles are, they are directly across from each other, and we see that they arent really like in the same part of the line, but we know that the one congruent to the 128 is the outer right angle, making the missing angle congruent because they are vertical angles making the missing angle 128 too

(did that make sense?)