Chapter 8: Quadrilaterals — Online MCQ Test
MATHS · CLASS 9th · Karnataka State Board
Practice Chapter 8: Quadrilaterals with a free chapter-wise online MCQ test.
This chapter covers: This chapter details parallelogram properties angle sum property quadrilateral classification and the mid-point theorem with proofs..
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Chapter 8: Quadrilaterals — Important Questions & Answers
What is the sum of the interior angles of any quadrilateral?
- A. 180°
- B. 360°
- C. 270°
- D. 720°
Answer: B. 360°
A quadrilateral can be divided into two triangles, and each triangle has angle sum 180°. So, the total is 360°.
A quadrilateral can be divided into two triangles, and each triangle has angle sum 180°. So, the total is 360°.
In a parallelogram, opposite sides are:
- A. Equal and parallel
- B. Equal but not parallel
- C. Perpendicular and equal
- D. Only parallel, not equal
Answer: A. Equal and parallel
A parallelogram is defined as a quadrilateral in which both pairs of opposite sides are parallel, and these opposite sides are also equal.
A parallelogram is defined as a quadrilateral in which both pairs of opposite sides are parallel, and these opposite sides are also equal.
If one angle of a parallelogram is 70°, what is the measure of its adjacent angle?
- A. 70°
- B. 90°
- C. 110°
- D. 180°
Answer: C. 110°
Adjacent angles of a parallelogram are supplementary. So, the adjacent angle is 180° − 70° = 110°.
Adjacent angles of a parallelogram are supplementary. So, the adjacent angle is 180° − 70° = 110°.
Which of the following is NOT a property of a parallelogram?
- A. Opposite sides are equal
- B. Opposite angles are equal
- C. Diagonals are equal in all parallelograms
- D. Adjacent angles are supplementary
Answer: C. Diagonals are equal in all parallelograms
Diagonals of a parallelogram do not have to be equal in every case. They bisect each other, but equal diagonals occur only in special parallelograms like rectangles.
Diagonals of a parallelogram do not have to be equal in every case. They bisect each other, but equal diagonals occur only in special parallelograms like rectangles.
A quadrilateral has one pair of opposite sides both equal and parallel. Which of the following must be true?
- A. It is always a kite
- B. It is always a parallelogram
- C. It is always a trapezium
- D. It is always a rectangle
Answer: B. It is always a parallelogram
If one pair of opposite sides in a quadrilateral are both equal and parallel, then the quadrilateral is a parallelogram.
If one pair of opposite sides in a quadrilateral are both equal and parallel, then the quadrilateral is a parallelogram.