Answer:
Measurement 1 and measurement 3 are both 52 degrees.
Explanation:
Measurements 6 and 3 are same-side interior angles, meaning that they are supplementary. Because they're supplementary, they add up to 180 degrees when put together. Since we know that measurement 6 is 126 degrees, we subtract that from 180 to get 52. And even though it would only seem that it gets us measurement 3, it also gives us measurement 1 because measurement 1 and 3 are vertical angles, meaning they have the same degrees.