Use the diagram to find unknown angle measures

Hello!

115 and 1 are supplementary, or they add up to 180. This means we subtract to find 1.

180-115=65

Therefore, angle 1 is 65 degrees.

115 and 2 are vertical angles. Therefore they are congruent, so angle 2 is 115 degrees.

1 and 3 are corresponding angles, so they are also congruent. Therefore angle 3 is 65 degrees.

∠1=65°
∠2=115°
∠3=65°

I hope this helps!