Answer:
The LCM, or least common multiple, of 6 and 8 is 24.
5. complementary angles = 90°
90 - 40 = 50
50°
6. supplementary angles = 180°
180 - 40 = 140
140°

as the angle made by diameter of circle to any point on the circle is of 90°
hence,
53y -16 = 90
53y= 106
y = 2
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