The value of y in the figure is 163°
Opposite angles are a special type of angle formed when two lines intersect creating four angles . They are also sometimes called vertical angles or vertically opposite angles.
Each pair of opposite angles is formed by non-adjacent angles.Opposite angles are always congruent. Hence, they have the same measure .
z° = x° (opposite angles)
y = 163° (opposite angles)
Hence, y = 163°