Explanation:
we know that,
Then,
33° + 87° + x = 180°
x = 180° - 120°
Now,
x + y = 180°
60° + y = 180°
Hence,
The value of y = [120]°
Answer:
y = 120°
angles in a triangle add up to 180 degrees
180 - (87 +33) = 60
x = 60 degrees
angles on a straight line add up to 180 degrees
180 - 60 = 120
y = 120
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