is this a corresponding angle, alternate exterior angle, vertical angle, a supplementary angle, or a linear pair?

Vertical angles

Step-by-step explanation:

∠ and ∠ are formed by the same lines and are "opposite" to each other, so they are vertical angles by definition. Hope this helps!

no idea

step-by-step explanation:

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.