Answer:
Step-by-step explanation:
Before we begin, I'm assuming that the two horizontal lines are parallel to one another, and as a result, the steep line is a transversal. We know that angle 1 (attached below) and angle 2 (attached below) have equal angle measures because of the corresponding angle theorem. We know that angle 2 and 3 (attached below) add up to 180 degrees because of the linear pair postulate.
