Answer:
w=63, x = 86, y=38 and z = 25 degrees
Explanation:
w + 117 = 180
so w = 180 - 117 = 63 degrees.
x = 180 - 63 - 31 = 180 - 94
= 86 degrees
y = 180 - 86 - 56 = 180 - 142
= 38 degrees
z = 180 - 117 - 38 = 180 - 155
= 25 degrees
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