CBSE Questions for Class 9 Maths Lines And Angles Quiz 10 - MCQExams.com

An angle is more than $$45^o$$. Its complementary angle must be less than $$45^o$$.
  • True
  • False
Two supplementary angles always form a linear pair.
  • True
  • False
Two adjacent angles always from a linear pair.
  • True
  • False
In a pair of adjacent angles, (i) vertex is always common, (ii) one arm is always common, and (iii) uncommon arms are always opposite rays 
Then 
  • All (i), (ii) and (iii) are true
  • (iii) is flase
  • (i) is false but (ii) and (iii) are true
  • (ii) is false
In which of the following figures, $$a$$ and $$b$$ are forming a pair of adjacent angles?
Two angles making a linear pair are always supplementary.
  • True
  • False
Vertically opposite angles are always 
  • supplementary
  • complementary
  • adjacent
  • equal
In figure, $$POQ$$ is a line, then $$a$$ is equal to 
1790172_08ff17eac3eb4813ad0bfc40bc6c6154.png
  • $$35^o$$
  • $$100^o$$
  • $$80^o$$
  • $$135^o$$
In figure, $$a=40^o$$. The value of $$b$$ is 
1790179_93ece83ef768425d84260bbb821f50d2.png
  • $$20^o$$
  • $$24^o$$
  • $$36^o$$
  • $$120^o$$
In figure, the reflex $$ \angle AOB$$ is equal to :
1880634_2ff1acc7102343c88a289645e70a9a8e.png
  • $$ 60^{\circ} $$
  • $$ 120^{\circ} $$
  • $$ 300^{\circ} $$
  • $$ 360^{\circ} $$
In figure, which one of the following is not true ?
1790210_53d9fbfbea7f4e039cdbdc89856a0353.png
  • $$\angle 1+\angle 5=180^o$$
  • $$\angle 2+\angle 5=180^o$$
  • $$\angle 3+\angle 8=180^o$$
  • $$\angle 2+\angle 3=180^o$$
It is possible to have a triangle in which two of the angles are obtuse.
  • True
  • False
In figure, which of the following is true?
1790213_1a7a3dd1c1a64254b849a5768aa1a577.png
  • $$\angle 1=\angle 5$$
  • $$\angle 4=\angle 8$$
  • $$\angle 5=\angle 8$$
  • $$\angle 3=\angle 7$$
If an angle is $$60^o$$ less than two times of its supplement, then the greater angle is 
  • $$100^o$$
  • $$80^o$$
  • $$60^o$$
  • $$120^o$$
In Fig., $$PQ = PR, RS = PQ$$ and $$ST || QR$$. If the exterior angle $$RPU$$ is $$140^o$$, the the measures of angle $$TSR$$ is
1791551_f0e5984a6a2d41cc9c53342f0bd20fee.png
  • $$55^o$$
  • $$40^o$$
  • $$50^o$$
  • $$45^o$$
In the given figure, the value of $$x$$ that will make $$AOB$$ a straight line is

1802552_2b2fc4de66b34ecb95a33218695ce04a.png
  • $$x=40$$
  • $$x=36$$
  • $$x=30$$
  • $$x=25$$
A pair of supplementary angles is
  • $$55^{\circ},115^{\circ}$$
  • $$65^{\circ},125^{\circ}$$
  • $$47^{\circ},133^{\circ}$$
  • $$40^{\circ},50^{\circ}$$
If an angle measures $$10^{o}$$ more than its complement, then the measure of the angle is:
  • $$40^{o}$$
  • $$55^{o}$$
  • $$35^{o}$$
  • $$50^{o}$$
Pair of vertically opposite angles are always supplementary
  • True
  • False
A pair of complementary angles is:
  • $$130^{0},50^{0}$$
  • $$35^{0},55^{0}$$
  • $$25^{0},75^{0}$$
  • $$27^{0},53^{0}$$
$$30^{0}$$ is one-half of its complement.
  • True
  • False
If the difference of two complementary angles is $$10$$, then the smaller angle is:
  • $$40$$
  • $$50$$
  • $$45$$
  • $$35$$
In figure, which of the following pairs of angles are corresponding angles:
1880659_5895bc453b2c40cc807aea90edd57a5c.png
  • $$ \angle 1, \angle 8 $$
  • $$ \angle 2, \angle 6 $$
  • $$ \angle 4, \angle 8 $$
  • $$ \angle 3, \angle 2 $$
Angles $$t$$ and $$h$$ are
1946811_a0273994aa8948f8835577f2de443710.png
  • Alternate angles
  • Corresponding angles
  • Interior angles
  • Exterior angles
$$r$$ and $$s$$ are 
1946843_b3660d1709c749658598b6ccb3fb6cd9.png
  • Corresponding angles
  • Alternate interior angles
  • Pair of interior angles on same side
  • Alternate exterior angles
A pair of corresponding angle is 
1946805_1dd31c3d59374d628498b52a57786e1b.png
  • $$r$$ and $$q$$
  • $$r$$ and $$s$$
  • $$t$$ and $$q$$
  • $$r$$ and $$t$$
An angle is $$18^{\circ}$$ less than its complementary angle. The measure of this angle is
  • $$36^{\circ}$$
  • $$48^{\circ}$$
  • $$83^{\circ}$$
  • $$81^{\circ}$$
In the given figure, $$ABC$$ is an isosceles triangle with $$AB=AC$$. If $$AE=AF$$ and $$\angle BAE=40^0$$, then the measure of the angle $$FEC$$ is  
1962398_f0db9dc0704f4df794b20fd25a1615ea.png
  • $$15^0$$
  • $$20^0$$
  • $$40^0$$
  • $$60^0$$
$$M$$ and $$N$$ are 
1946817_eb0e476253b7476683d20615849fbd0c.png
  • Alternate exterior angles
  • Alternate interior angles
  • Corresponding angles
  • Vertically opposite angles
A pair of alternate exterior angles is
1946820_fb813bd8d6b74d47bd0d5c1d040b3cef.png
  • $$a$$ and $$c$$
  • $$a$$ and $$d$$
  • $$c$$ and $$b$$
  • $$d$$ and $$b$$
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