Answer:
Explanation:
First, I drew a line parallel to the two other lines.
- Then, I knew that 50° was part of ∠1 and was a corresponding angle.
- I also knew that the other angle was 80° because of the 180-angle property.
So then, I summed up both parts to get my answer. The measure of m∠1 is 130°. Please look at picture to learn more.