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

In the given figure, $$AOB$$ is a straight line and the ray $$OC$$ stands on it. If $$\angle BOC=132^{o}$$, then $$\angle AOC=?$$
1781522_9ba045db7681493eaa71b279b7f554fe.PNG
  • $$68^{o}$$
  • $$48^{o}$$
  • $$42^{o}$$
  • None of these
Triangle DEF in figure is right triangle with $$\angle E=90^{o}$$.
What type of angles are $$\angle D$$ and $$\angle F$$?
1789755_38a55980e6774734a33291bd39d41a8e.png
  • They are equal angles
  • They form a pair of adjacent angles
  • They are complementary angles
  • They are supplementary angles
In the given figure, $$AOB$$ is a straight line, $$\angle AOC$$ = $$68^{o}$$ and $$\angle BOC$$ = $$x^{o}$$.Find x


1781542_67df5c1cc997454a9f82401bd2898c0d.PNG
  • $$32$$
  • $$22$$
  • $$112$$
  • $$132$$
Angles which are both supplementary and vertically opposite are 
  • $$95^o , 85^o$$
  • $$90^o, 90^o$$
  • $$100^o, 80^o$$
  • $$45^o, 45^o$$
Angles between South & West and South & East are 
  • vertically opposite angles
  • complementary angles
  • making a linear pair
  • adjacent but not supplementary
If the complement of an angle is $$79^o$$, then the angle will be of :
  • $$1^o$$
  • $$11^o$$
  • $$79^o$$
  • $$101^o$$
In figure, $$PQ$$ is a mirror, $$AB$$ is the incident ray and $$BC$$ is the reflected ray. If $$\angle ABC=46^o$$, then $$\angle ABP$$ is equal to 
1789955_20c0d4c8d943424381e943f52172c9d4.png
  • $$44^o$$
  • $$67^o$$
  • $$13^o$$
  • $$62^o$$
The angles between North & West and South & East are
  • complementary
  • supplementary
  • both are acute
  • both are obtuse
In figure, $$POQ$$ is a line. If $$x=30^o$$, then $$\angle QOR$$ is 
1790048_c398b29f2934481a9f7ad9f228cffe86.png
  • $$90^o$$
  • $$30^o$$
  • $$150^o$$
  • $$60^o$$
The angle which makes a linear pair with an angle of $$61^\circ$$ is of 
  • $$29^\circ$$
  • $$61^\circ$$
  • $$122^\circ$$
  • $$119^\circ$$
In figure, lines $$l$$ and $$m$$ intersect each other at a point. Which of the following is false?
1790003_82a833f333ae41e4b23e50afdad7d79a.png
  • $$\angle a= \angle b$$
  • $$\angle d =\angle c$$
  • $$\angle a+ \angle d=180^o$$
  • $$\angle a=\angle d$$
In figure, the value of $$x$$ is 
  • $$110^o$$
  • $$46^o$$
  • $$64^o$$
  • $$150^o$$
In figure, the value of $$y$$ is 
1790054_daf96052fa7a41daa3a172bba476f121.png
  • $$30^o$$
  • $$15^o$$
  • $$20^o$$
  • $$22.5^o$$
In figure, $$POR$$ is a line. The value of $$a$$ is 
1790024_738a54e80743421897a907b7192ba4dd.png
  • $$40^o$$
  • $$45^o$$
  • $$55^o$$
  • $$60^o$$
The angles $$x$$ and $$90^o -x$$ are:
  • supplementary
  • complementary
  • vertically opposite
  • making a linear pair
The angles $$x-10^o$$ and $$190^o-x$$ are 
  • interior angles on the same side of the transversal
  • making a linear pair
  • complementary
  • supplementary
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Both Assertion and Reason are incorrect
If two supplementary angles are in the ratio $$1:2$$, then the bigger angle is 
  • $$120^o$$
  • $$125^o$$
  • $$110^o$$
  • $$90^o$$
In figure, $$\angle AOC$$ and $$\angle BOC$$ form a pair of 
1790104_904e7878430e4f4282ff403bb05761b1.png
  • vertically opposite angles.
  • complementary angles.
  • alternate interior angles.
  • linear pair of angles.
One obtuse angle and one acute angle can make a pair of complementary angels.
  • True
  • False
One obtuse angle and one acute angle can make a pair of supplementary angles.
  • True
  • False
In figure, the value of $$a$$ is 
1790105_2534ce8a890841aa8c7fa44ebc9674c3.png
  • $$20^o$$
  • $$15^o$$
  • $$5^o$$
  • $$10^o$$

1790092_de2f6f8a2a9c49fd828d9199bd4f8191.png
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Both Assertion and Reason are incorrect
$$ 40^o $$ is the complement of $$ 60^o $$?
  • True
  • False
$$ 45^o $$ is the supplement of $$ 45^o $$?
  • True
  • False
The difference of two complementary angles is $$30^o$$. Then, the angles are:
  • $$60^o, 30^o$$
  • $$70^o, 40^o$$
  • $$20^o, 50^o$$
  • $$105^o, 75^o$$
Two right angle are complementary to each other.
  • True
  • False
In figure, $$a$$ and $$b$$ are :
1790076_73be170cc1db45cf941c753798f09545.png
  • alternate exterior angles
  • corresponding angles
  • alternate interior angles
  • vertically opposite angles
In figure, lines $$PQ$$ and $$ST$$ intersect at $$O$$. If $$\angle POR=90^o$$ and $$x:y =3:2$$, then $$z$$ is equal to 
1790148_adbdb260b80d4453b4de5e1941ff1d27.png
  • $$126^o$$
  • $$144^o$$
  • $$136^o$$
  • $$154^o$$
Two angles making a linear pair are always adjacent angles.
  • True
  • False
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