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A quadrilateral whose opposite angles are 80°, 100°, 80°, 100° taken in order is a parallelogram. (Choose correct statement.)

Class 9Conditions for a ParallelogramGeometry — Quadrilaterals
  • ATrue, opposite angles are equal
  • BFalse, angles do not add to 360
  • CFalse, it is a trapezium
  • DTrue only if a square

Step-by-Step Solution

Angles in order 80,100,80,100 sum to 360 and opposite angles (80=80, 100=100) are equal, so it is a parallelogram.
Answer: A) True, opposite angles are equal

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