CBSE Questions for Class 9 Maths Lines And Angles Quiz 3 - MCQExams.com

Choose the pair of complementary angles:
  • $$30^{\circ}$$, $$150^{\circ}$$
  • $$76^{\circ}$$, $$14^{\circ}$$
  • $$65^{\circ}$$, $$65^{\circ}$$
  • $$120^{\circ}$$, $$30^{\circ}$$
Supplementary angle of $$100^{\circ}$$ is
  • $$180^{\circ}$$
  • $$90^{\circ}$$
  • $$80^{\circ}$$
  • $$60^{\circ}$$
Measure of an obtuse angle is:
  • $$> 0^{\circ}, < 90^{\circ}$$
  • $$> 90^{\circ}, < 180^{\circ}$$
  • $$> 0^{\circ}, < 270^{\circ}$$
  • $$> 0^{\circ}, < 180^{\circ}$$
Supplement angle of
272147_df501bb5f432452eb46b080faba320c6.png
  • $$122.7^{\circ}$$
  • $$131.7^{\circ}$$
  • $$132.7^{\circ}$$
  • $$132.4^{\circ}$$
The complementary angle of $$\displaystyle 30^{\circ}$$ is:
  • $$\displaystyle 60^{\circ}$$
  • $$\displaystyle 90^{\circ}$$
  • $$\displaystyle 150^{\circ}$$
  • none of these
If l$$\displaystyle \parallel $$m and m $$\displaystyle \parallel $$ n then
  • l$$\displaystyle \parallel $$p
  • l$$\displaystyle \parallel $$q
  • m$$\displaystyle \parallel $$q
  • l$$\displaystyle \parallel $$n
$$\displaystyle 96^{0}$$ is an example of-
  • Acute
  • Obtuse
  • Right
  • None of these
If two angles in a triangle are 75$$\displaystyle ^{\circ}$$ and 95$$\displaystyle ^{\circ}$$ then the third angle is__
  • 30$$\displaystyle ^{\circ}$$
  • 20$$\displaystyle ^{\circ}$$
  • 10$$\displaystyle ^{\circ}$$
  • 40$$\displaystyle ^{\circ}$$
A line AB is parallel to the line CD. This is symbolically written as
  • $$\overleftrightarrow{AB} \neq \overleftrightarrow{CD}$$
  • $$\overleftrightarrow{AB} = \overleftrightarrow{CD}$$
  • $$\overleftrightarrow{AB} \perp \overleftrightarrow{CD}$$
  • $$\overleftrightarrow{AB} || \overleftrightarrow{CD}$$
Example for a pair of parallel lines
  • corners of a room
  • railway track
  • sides of a triangle
  • none
The value of $$y$$ in the given figure is _____
416608.bmp
  • $$65$$
  • $$85$$
  • $$75$$
  • $$80$$
In the figure, $$\displaystyle PQ\parallel ST,\angle PQR={ 100 }^{ o }$$, and $$\displaystyle \angle RST={ 110 }^{ o }$$. Then $$\displaystyle \angle QRS$$ is equal to
378227.PNG
  • $$\displaystyle { 80 }^{ o }$$
  • $$\displaystyle { 30 }^{ o }$$
  • $$\displaystyle { 70 }^{ o }$$
  • $$\displaystyle { 60 }^{ o }$$
$$\displaystyle 170^{0}$$ is an example of-
  • Acute
  • Right
  • Obtuse
  • None of these
A pair of angles with a common vertex and common arm are called
  • Adjacent angles
  • Complementary
  • Supplementary
  • None
Which of the following are acute angles?
443785.PNG
  • a and c
  • a and b
  • c and d
  • b and d
An angle that is $$\displaystyle  { 1 }^{ o }$$ less than right angle is:
  • Reflex angle
  • Straight angle
  • Obtuse angle
  • Acute angle
Range of an obtuse angle is:
  • $$[0˚, 90˚)$$
  • $$(0˚, 90˚]$$
  • $$[90˚, 180˚)$$
  • $$(90˚, 180˚)$$
If one angle at a point is reflex angle, the other at that point may be :
  • Acute angle
  • Obtuse angle
  • Straight angle
  • Acute or obtuse angle
Which of the following is obtuse angle?
  • Two right angles
  • One and half right angles
  • One right angle
  • Half a right angle
The supplementary angle of an angle is one third of the angle. Then the angle and its supplement are __________.
  • $$135^o, 45^o$$
  • $$60^o, 180^o$$
  • $$120^o, 350^o$$
  • $$60^o, 120^o$$
What is the range of reflex angle?
  • Greater than zero but less than $$\displaystyle { 90 }^{ o }$$
  • Greater than $$\displaystyle { 90 }^{ o }$$ but less than $$\displaystyle { 180 }^{ o }$$
  • Greater than $$\displaystyle { 180 }^{ o }$$ but less than $$\displaystyle { 360 }^{ o }$$
  • Equal to $$\displaystyle { 360 }^{ o }$$
Which of the following is a reflex angle?
  • $$\displaystyle { 180 }^{ o }$$
  • $$\displaystyle { 360 }^{ o }$$
  • $$\displaystyle { 204 }^{ o }$$
  • $$\displaystyle { 135 }^{ o }$$
Reflex angle is greater than _____ but less than _____angle.
  • Complete, acute
  • Acute, Straight
  • Obtuse, Straight
  • Straight, Complete
Sum of two obtuse angle results in:
  • Acute angle
  • Right angle
  • Obtuse angle
  • Reflex angle
Which of the following is not an obtuse angle ?
  • $$\displaystyle { 127 }^{ o }$$
  • $$\displaystyle { 149 }^{ o }$$
  • $$\displaystyle { 175 }^{ o }$$
  • $$\displaystyle { 182 }^{ o }$$
Find the measure of the missing angle in the triangle below.

537415.PNG
  • $$35^o$$
  • $$40^o$$
  • $$45^o$$
  • $$50^o$$
  • $$55^o$$
If two angles are supplementary, then their sum is
  • $$90^o$$
  • $$180^o$$
  • $$270^o$$
  • $$360^o$$
If sum of two angles is $$\displaystyle { 90 }^{ o }$$. They will be:
  • Linear pair
  • Supplementary angles
  • Complementary angles
  • Corresponding angles
Two angles are supplementary, if one of them is $$\displaystyle { 49 }^{ o }$$. Find the other angle?
  • $$\displaystyle { 139 }^{ o }$$
  • $$\displaystyle { 131 }^{ o }$$
  • $$\displaystyle { 141 }^{ o }$$
  • $$\displaystyle { 135 }^{ o }$$
In the figure aove, $$C$$ is the intersection of $$\bar { AD } $$ and $$\bar { BE } $$. If it can be determined, what is the measure of $$\angle BAC$$?
500740.jpg
  • $${80}^{o}$$
  • $${100}^{o}$$
  • $${110}^{o}$$
  • $${115}^{o}$$
  • Cannot be determined from the given information
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