Page 71 - Mathematics Class - IX

Assertion-Reason Based Questions
Assertion-Reason Based Questions
Directions for Questions 1 to 5: In each of the questions given below, there are two statements marked as
Assertion (A) and Reason (R). Mark your answer as per the codes provided below:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.

(c) A is true but R is false.
(d) A is false but R is true.
Q. 1. Assertion (A) : A quadrilateral can have all sides of different lengths and still be a parallelogram.
Reason (R) : A parallelogram has two pairs of opposite sides parallel to each other.
Q. 2. Assertion (A) : The sum of the measures of all the four angles of a rectangle is 360°.
Reason (R) : A rectangle is a polygon with four sides and four vertices.

Q. 3. Assertion (A) : If in a cyclic quadrilateral, one angle is 40° then the opposite angle is 140°.
Reason (R) : Sum of opposite angles in a cyclic quadrilateral is equal to 360°.
Q. 4. Assertion (A) : If three angles of a quadrilateral are 130°, 70°, 60°, and the fourth angle is 100°.
Reason (R) : The sum of all the angles of a quadrilateral is 360°.

Q. 5. Assertion (A) : Two diameters of a circle intersect each other at right angle. Then the quadrilateral
formed by joining their end-points is a square.

Reason (R) : Angle in a semi-circle is a right angle.

Crossword Puzzles
Crossword Puzzles
Complete the following crossword puzzles. Down

1. 1. ___________ is the longest side in a right-angled
triangle.

2. 2. Sides opposite to equal angles are ___________.
3.
4. Any line joining two points on the circumference
4. of circle is ___________.

5.
Across

3. Number of semicircle in a circle are _________ .
6. 5. Angle in a semi circle is ___________.

6. In supplementary angles, the ___________ of
their measure is 180°.

Answers

Case-Study Based Questions: 1. (iii) 2. (iii) 3. (ii)
Assertion-Reason Based Questions: 1. (d) 2. (b) 3. (c) 4. (a) 5. (a)
Crossword: Down: 1. hypotenuse 2. equal 4. chord
Across: 3. two 5. right angled 6. sum

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