Based on the definition of supplementary angles, the value of y is: 92°.
What are Supplementary Angles?
Supplementary angles are angles that add up to give 180 degrees.
Thus:
(x + 1) + (x - 3) = 180
Find x
x + 1 + x - 3 = 180
2x - 2 = 180
2x = 180 + 2
2x = 182
x = 91
x + 1 = y (alternate interior angles are congruent)
Plug in the value of x
91 + 1 = y
y = 92°
Therefore, based on the definition of supplementary angles, the value of y is: 92°.
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