Chapter Exam

Chapter 8: Quadrilaterals — Online MCQ Test

Q: What is the sum of the interior angles of any quadrilateral?

Answer: B. 360° — A quadrilateral can be divided into two triangles, and each triangle has angle sum 180°. So, the total is 360°.

Q: In a parallelogram, opposite sides are:

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.

Q: If one angle of a parallelogram is 70°, what is the measure of its adjacent angle?

Answer: C. 110° — Adjacent angles of a parallelogram are supplementary. So, the adjacent angle is 180° − 70° = 110°.

Q: Which of the following is NOT a property of a parallelogram?

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.

Q: A quadrilateral has one pair of opposite sides both equal and parallel. Which of the following must be true?

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.

MATHS · CLASS 9th · Karnataka State Board

Practice Chapter 8: Quadrilaterals with a free chapter-wise online MCQ test for Karnataka State Board CLASS 9th MATHS. This chapter covers: This chapter details parallelogram properties angle sum property quadrilateral classification and the mid-point theorem with proofs.. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 8: Quadrilaterals — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 9th MATHS — Chapter 8: Quadrilaterals, with answers and explanations. These are sample questions; the exam has its own separate question set.

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°.

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.

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°.

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.

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.