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9. The picture of the regulator of a fan (at the ‘OFF’ position) is shown. By how many
degrees does it have to be turned if I want to turn it from the ‘OFF’ position to speed OFF
‘4’? 5 1
(a) 160° (b) 240° (c) 288° (d) 360° 4 2
3
10. Nidhi has cut out a semi-circular piece from a plastic sheet
and divided it into 8 equal parts as shown. She wants to use
this to measure angles. Which of the following angles will
she be able to measure accurately using this semi-circular
piece?
(a) 30° (b) 45° (c) 60° (d) 100°
B. Assertion and Reason Type Questions.

In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R).
Choose the correct option.
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion
(A).
(c) Assertion (A) is true but Reason (R) is false.

(d) Assertion (A) is false but Reason (R) is true.
q p

1. Assertion (A): In the figure, p || q. r

Reason (R): Two lines that lie in the same plane and never intersect each other are known as
parallel lines.
2. Assertion (A): A divider is a more effective tool than a ruler for determining the length of a line segment.
Reason (R): A line segment can be measured with the use of a divider to eliminate errors that may
arise from the thickness and angular viewing of the line segment while measuring it
with a ruler.
3. Assertion (A): In the given figure, if point A is shifted to point B along the ray PX such that PB = 2PA,
then the measure of ∠BPY is greater than 45°.
X
B
A

45°
P Y
Reason (R): Increasing the arms of an angle on the paper does not affect the measure of the angle.
C. Fill in the blanks.
1. A ray has only .................... end point.

2. A line segment has a .................... length.
3. If two co-planar lines are non-intersecting, then they will be .................... .

4. An angle whose measure is more than 0° but less than 90°, is called an .................... angle.

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