<h2>
Answer: 55 degrees</h2>
Step-by-step explanation:
Every triangle has 3 sides and 3 interior angles whose measures sum to 180 degrees. For example, a triangle with angles
,
and
:

Following this rule, we will apply it to the angles XYZ, YXZ and the unknown XZY:



Finally:

N=(-1,-4)
hmm, a 270 counterclockwise rotation is the same as a 90 degree clockwise
so that would become (-4,1)
N'=(-4,1)
4 +- √16 - 4(2)(1) / 4 --> 4 +- √8 / 4 --> 4 +- 2√2 / 4 --> 2 +- √2/2
Ans: 2 + √2/2 and 2 - √2/2