D I believe I hope this helps :)
Answer: (10,9) is the correct answer.
The answer is 5 how this helps
Theorem:
In a triangle, the measure of an exterior angle is equal to the sum of the measures of the remote interior angles.
The 88-deg angle is an exterior angle of the triangle.
The two angles labeled y are the remote interior angles to the 88-deg angle.
That means that the sum of the measures of the angles labeled y equals 88.
y + y = 88
2y = 88
y = 44
Answer: C. 44 deg
Take the arcsin on both sides.
Let x = the angle you need to find.
arcsin(sin x) = arcsin(4/15)
x = arcsin(4/15)
x = 15.4660099534
x = 15.47°
Done!
