RS Aggarwal Solutions: Lines and Angles (Exercise 9C) MCQs

Solution 1: 
(c) a line

Solution 2: 
(b) a ray

Solution 3: 
(a) a line segment

Solution 4: 
(b) a line segment

Solution 5:
(b) a line segment.

Solution 6:
(d) unlimited number

Solution 7:
(a) one only

Solution 8: 
(c) in a line

Solution 9: 
(a) at a point
Two lines intersect at a point.

Solution 10:
(a) exactly one line segment

Solution 11:
(d) 0

Solution 12:
(d) 3

Solution 13: 
(c) every line segment has a definite length

Solution 14:
(c) An unlimited number

Solution 15:
(b) Ray is the same as ray
Explanation: Ray AB not same as ray BA. Both are different.

Solution 16: 
(c) vertex of an angle lie on it.

Solution 17: 
(c) an angle.

Solution 18:
(c) A straight angle

Solution 19: 
(b) a right angle.

Solution 20: 
(b) an obtuse angle
Explanation: An angle measuring 91° is an obtuse angle as it is more than 90° and less than 180°.

Solution 21:
(d) a reflex angle
Explanation: An angle measuring 270° is a reflex angle as it is greater than 180° and less than 360°.

Solution 22: 
(c) 180°

Solution 23: 
(c) a reflex angle
Explanation: A reflex angle is greater than 180° but less than 360°

Solution 24: 
(d) a complete angle

Solution 25:
(b) more than 180° but less than 360°

Solution 26: 
(b) 180°
Explanation: Two right angles = (2 × 90)° = 180°

Solution 27: 
(b) 135°
Explanation: 3/2 of a right angle = 3/2 × 90° = 3 × 45° = 135°

Solution 28: (c) 10°
Explanation: Number of spokes = 36
Measure of the angle of the wheel = Complete angle = 360°
∴ Angle between a pair of adjacent spokes = Measure of angles/Number of spokes = 360° / 36 = 10°