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Step-by-step explanation:
the total angle sum of the quadrilateral is 360 degrees.
Therefore, 4x + 7x + 15x + 10x = 360°
36x = 360°
x = 360 / 36
x = 10°
Smallest angle is 4x and largest angle is 15x.
Therefore, 4x = 4 × 10 = 40°
15x = 15 × 10 = 150°
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