- A90°
- B180°
- C270°
- D360°
Step-by-Step Solution
Adjacent angles of a parallelogram are co-interior (supplementary), so they add to 180°.
Answer: B) 180°
In a parallelogram, two adjacent angles add up to:
Class 9Angle Sum Property of QuadrilateralsGeometry — Quadrilaterals
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Angle Sum Property of Quadrilaterals practice questions
More Class 9 Angle Sum Property of Quadrilaterals practice
Can a quadrilateral have all four angles obtuse (each greater than 90°)?Arjun says: 'In any quadrilateral, if three angles are acute, the fourth angle must be…In quadrilateral ABCD, the bisectors of angle A and angle B meet at point P. If angle A…The angles of a quadrilateral are (3x - 5), (2x + 15), (4x - 20) and (x + 40) degrees.…Meera is verifying that a paper quadrilateral she cut is valid. She measures three…