Since m || n, 2x = 60 degree(angles are supplementary)
Therefore, x = 30
Therefore the third angle in the triangle is 30(since the sum of angles in a triangle is 180 degree)
y + 30 = 180(sum of angles in a straight line is 180)
y = 150(Option D)
Since m || n, 2x = 60 degree(angles are supplementary)
Therefore, x = 30
Therefore the third angle in the triangle is 30(since the sum of angles in a triangle is 180 degree)
y + 30 = 180(sum of angles in a straight line is 180)
y = 150(Option D)
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