Class 9 Maths MCQ – Types of Quadrilaterals

This set of Class 9 Maths Chapter 8 Multiple Choice Questions & Answers (MCQs) focuses on “Types of Quadrilaterals”.

1. If one pair of opposite sides are parallel in a quadrilateral, it is called __________
a) trapezium
b) rhombus
c) square
d) parallelogram
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Answer: a
Explanation: In a trapezium, one pair of sides are parallel as shown in the diagram.

2. Which of the following shapes represent a rhombus?
a)
b)
c)
d)
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3. If one of the angles of a quadrilateral is not right angle but all the sides are equal, it is called a square.
a) True
b) False
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4. At which angle do diagonals of a rhombus bisects each other?
a) 180°
b) 360°
c) 270°
d) 90°
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Answer: d
Explanation: A rhombus is shown in the diagram below.

For ∆AOB and ∆AOD,
AB = AD (sides of the same rhombus)
OB = OD (diagonals of a parallelogram bisect each other)
OA = OA (same side)
Hence, according to SSS rule, ∆AOB and ∆AOD are congruent to each other.
Therefore,
∠AOB = ∠AOD
∠AOB + ∠AOD = 180° (linear pair of angles)
2∠AOD = 180°
Therefore, ∠AOD = 90°

5. From the diagram given below, if AB = BC and AD = CD then what is the given shape called?

a) Square
b) Kite
c) Rhombus
d) Trapezium
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Sanfoundry Global Education & Learning Series – Mathematics – Class 9.

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