Answer:
Corresponding angles
Step-by-step explanation:
A corresponding angles is, and I quote, "the angles which occupy the same relative position at each intersection where a straight line crosses two others. If the two lines are parallel, the corresponding angles are equal." (See image below)
So, looking at our words and graph, 5 and 1 are corresponding angles!
Hope this helped!
Source(s) used: G*ogle
