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acute
Opposite angles of a parallelogram are equal, and adjacent angles are supplementary. Let one angle be θ, then the adjacent angle is 4θ + 50° → θ + 4θ + 50° = 180° → 5θ = 130° → θ = 26° → The two adjacent angles are 26° and 154°. → The angles of the parallelogram are 26°, 154°, 26°, 154°.
No, 180 degrees is a straight angle. A reflex angle is one whose value is between 180 and 360 degrees.
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An angle of 283 degrees is a reflex angle