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Rahul claims he can construct a unique quadrilateral from its 4 angles alone (e.g. 60, 80, 100, 120°).
Is his claim correct, and why?

Class 8Constructing QuadrilateralsGeometry
  • ACorrect, angles fix the quadrilateral
  • BIncorrect, angles fix only the shape but not the size
  • CCorrect, since they add to 360°
  • DIncorrect, the angles do not add to 360°

Step-by-Step Solution

Four angles (summing to 360) can fit infinitely many quadrilaterals of different sizes — they fix the shape only. At least one length is needed, so the claim is wrong.
Answer: B) Incorrect, angles fix only the shape but not the size

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