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Answer:
x = 36; 2x = 72; 3x = 108; 4x = 144.
Explanation:
The sum of the angles of a quadrilateral is 360°, so you have ...
... x° + 2x° + 3x° + 4x° = 360° = 10x°
... x = 360°/10° = 36
The other angles are figured by multiplying by 2, or 3, or 4.
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