The answer would be C) Triangle ABC. This would because it matches with triangle XYZ's each respective angle. Hope this helped!
8.6.
Those symbols are absolute value symbols which calculate the distance from 0 of the value inside.
-8.6 is 8.6 units away from 0
Is your question written correctly? Just making sure.
Angle 1,6,4 and 8 are all 30 degrees because they are across from eachother