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CBSE Questions for Class 5 Maths Shapes And Angles Quiz 1 - MCQExams.com
CBSE
Class 5 Maths
Shapes And Angles
Quiz 1
Look at the angle in the picture and choose the correct option
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Right angle
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Less than Right angle
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More than Right angle
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None of these
Look at the angle in the picture and choose the correct option
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Right Angle
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Less than Right angle
0%
More than right angle
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None of these
Look at the angle in the picture and choose the correct option
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Right angle
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Less than Right angle
0%
More than Right angle
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None of these
Look at the angle in the picture and choose the correct option
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0%
Right angle
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Less than Right angle
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More than Right angle
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None of these
Name the angle formed at each corner of an envelope.
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Acute angle
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Obtuse angle
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Right angle
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Straight angle
Explanation
The envelope is nothing but rectangular in shape
$$\therefore$$ Each corner angle of Envelope is $$90^o$$ i.e. right angle.
Fill in the blanks with the correct word from the options given.
Vertical angles are .......... right angles.
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Always
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Never
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Sometimes
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Data Insufficient
Explanation
Vertical angles can be sometime right angle as shown in the figure.
So option $$C$$ is correct.
At $$4:15$$, the angle formed between the two hands of a clock is:
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0%
acute
0%
obtuse
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right angle
0%
none of these
Explanation
At $$4:15$$, the hour will be between $$4$$ and $$5$$.
And minute hand will be on $$3$$.
Thus, the angle formed between these two hands will be less than $$90^{o}$$.
Hence, they form a acute angle.
$$\displaystyle \angle AOB$$ is a / an _____________ angle.
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0%
acute
0%
right
0%
obtuse
0%
none of these
Explanation
An obtuse angle is one which measures more than $$90^o$$ but less than $$180^o$$.
$$\angle ABC$$ in the following figure is a / an:
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acute angle
0%
obtuse angle
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reflex angle
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straight angle
Explanation
Angles
larger than a straight
angle
but less than complete angle (i.e. between $$180^o$$ and $$360^o$$) are called
reflex angles.
Here, the given $$\angle ABC$$ measures
greater than $$180^o$$ but less than $$360^o$$.
Hence, the given angle is a reflex angle.
Therefore, option $$C$$ is correct.
What is the angle formed between the two hands of a clock at the time $$3:00?$$
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Right
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Acute
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Obtuse
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Left
Explanation
First, note that a clock is a circle made of $$360$$ degrees and that each number represents an angle and the separation between them is $$360/12 = 30$$. And at $$3:00,$$ the minute hand is on the $$12$$ and the hour hand is on the $$3.$$
The correct answer is $$3 * 30 = 90$$ degrees.
At $$3$$ o' clock the angle formed between the two hands of a clock is $$right \ angled$$.
Hence the correct answer is option $$A$$.
In Fig, POQ is a line. The value of x is:
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$$20^0$$
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$$25^0$$
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$$30^0$$
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$$35^0$$
Explanation
Sum of the angles forming a linear pair is $$180^\circ$$
Here angles measuring $$40^\circ, 4x$$ and $$3x$$ form a linear pair.
So, $$40^\circ+4x+3x=180^\circ$$
$$7x+40^\circ=180^\circ$$
$$x=20^\circ$$
$$\displaystyle 179^{\circ}$$ is an example of
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obtuse angle.
0%
acute angle.
0%
right angle.
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None of the above
Explanation
An obtuse angle is an angle which is more than $$90^o $$ but less than $$180^o$$.
Hence
$$\displaystyle 179^{\circ}$$
is an example of obtuse.
Hence $$Op-A$$ is correct.
$$\displaystyle 89^{\circ}$$ is an example of :
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0%
obtuse
0%
acute
0%
right
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None of the above
Explanation
Angles between $$ {0}^{o} $$ and $$ {90}^{o} $$ are acute angles. Hence, $$ {89}^{o} $$ is an acute angle.
Number of right angles formed in the given figure is:
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$$5$$
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$$3$$
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$$2$$
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$$4$$
Explanation
There are four right angles in the figure which are $$ \angle PSR, \angle SRQ , \angle RQP , \angle QPS $$
Given : AB || CD.
If $$\angle\, 2$$ is an acute angle, then $$\angle\, 1$$ is
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0%
Acute
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Right
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Obtuse
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Straight
Explanation
$$\angle 1$$ and $$\angle 2$$ are supplementary angles .
$$\Rightarrow \angle 1+\angle 2={ 180 }^{ \circ }$$
Now $$\angle 2$$ is given acute
$$\Rightarrow \angle 2<{ 90 }^{ \circ }$$
$$\Rightarrow \angle 1>{ 90 }^{ \circ }$$
So it is an obtuse angle.
Straight angle is ________
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$$\displaystyle 90^{\circ}$$
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$$\displaystyle 180^{\circ}$$
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$$\displaystyle 60^{\circ}$$
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$$\displaystyle 45^{\circ}$$
Explanation
A straight angle $$ = {180}^{o} $$
An angle which measures $$\displaystyle 90^{\circ}$$ is called
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0%
Obtuse angle
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Acute angle
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Right angle
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None of these
Explanation
An angle which measures $$ {90}^{o} $$ is called a right angle.
Based on the angle measures given, which triangle is not acute?
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$$35^\circ,\, 69^\circ,\, 76^\circ$$
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$$60^\circ,\, 60^\circ,\, 60^\circ$$
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$$88^\circ,\, 46^\circ,\, 46^\circ$$
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$$90^\circ,\, 45^\circ,\, 45^\circ$$
Explanation
For acute angles triangle all the three angles must be less than $${ 90 }^{ \circ }$$.
In option $$D$$ one of the angle is $${ 90 }^{ \circ }$$ , so it is not acute angles triangle.
Number of right angles formed in the given figure is:
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$$5$$
0%
$$3$$
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$$2$$
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$$4$$
Explanation
There are two right angles in the figure which are $$ \angle PSR $$ and $$\angle QRS $$.
An angle which measures more than $$\displaystyle 0^{\circ}$$ and less than $$\displaystyle 90^{\circ}$$ is called
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0%
obtuse
0%
acute
0%
right
0%
none of these
Explanation
Angles which measure more than $$ {0}^{o} $$ and less than $$ {90}^{o} $$ are acute angles.
$$\displaystyle 91^{\circ}$$ is an example of
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0%
obtuse
0%
acute
0%
right
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Reflex
Explanation
An obtuse angle is one which is more than $$90^0$$ but less than $$180^0$$.
and hence
$$\displaystyle 91^{\circ}$$
is an example of obtuse.
Instrument used to measure or construct angles is
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Compass
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Scale
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Protractor
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Set Square
Explanation
An instrument used to measure or construct angles is a protractor.
Angles are measured in
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compasses
0%
protractor
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degrees
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centimetres
Explanation
Angles are measured in degrees
An angle which is more than $$180^{\circ}$$ and less than $$360^{\circ}$$ is called:
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obtuse angle
0%
right angle
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reflex angle
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complete angle
Explanation
By definition, we know, an angle which is more than $$180^o$$
180∘
and less than $$360^o$$
360∘
is called reflex angle.
That is, an a
ngle
larger than a straight
angle
but less than $$1$$ turn (between $$180^o$$ and $$360^o$$) are called
reflex angle.
Therefore, option $$C$$ is correct.
Which of the following are acute angles?
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a and c
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a and b
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c and d
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b and d
Explanation
From the figure it is clearly visible that 'a' and 'b' are acute angles which lies between $$\displaystyle { 0 }^{ o }$$ to $$\displaystyle { 90 }^{ o }$$.
An angle that is $$\displaystyle { 1 }^{ o }$$ less than right angle is:
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Reflex angle
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Straight angle
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Obtuse angle
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Acute angle
Explanation
Right angle measures $$\displaystyle { 90 }^{ o }$$
$$\displaystyle { 1 }^{ o }$$ less of right angle = $$\displaystyle { 90 }^{ o }-{ 1 }^{ o }$$
$$\displaystyle { 89 }^{ o }$$
Which is an acute angle.
Acute angle is the angle which is greater than $$\displaystyle { 0 }^{ o }$$ and less than $$\displaystyle { 90 }^{ o }$$.
Obtuse angle is the angle which is greater than $$\displaystyle { 90}^{ o }$$ and less than $$\displaystyle {180 }^{ o }$$.
Right angle is the angle which is equal to $$90^o$$.
Reflex angle is the angle which is greater than $$\displaystyle {180}^{ o }$$ and less than $$\displaystyle {360 }^{ o }$$.
Sum of right angles is $$\displaystyle { 720 }^{ o }$$. Find no. of right angles.
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$$8$$
0%
$$9$$
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$$10$$
0%
$$7$$
Explanation
One right angle = $$\displaystyle { 90 }^{ o }$$
Sum of right angle = $$\displaystyle { 720 }^{ o }$$
No. of right angles = $$\displaystyle \frac { { 720 }^{ o } }{ { 90 }^{ o } } ={ 8 }$$
An angle which measures $$180^{\circ}$$ is called_______angle.
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zero
0%
right
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straight
0%
acute
Explanation
An angle which measures
$$ {180}^{o} $$
is called a straight angle.
$$\displaystyle 96^{0}$$ is an example of-
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0%
Acute
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Obtuse
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Right
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None of these
Explanation
obtuse angles are those angles which are greater than 90 degrees and less than 180 degrees..
so,96 degrees is an example of obtuse angle..
Which of the following is obtuse angle?
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Two right angles
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One and half right angles
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One right angle
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Half a right angle
Explanation
Right angle $$=90^{\circ}$$
One and half right angle $$=\dfrac { { 90 }^{ \circ } }{ 2 } +{ 90 }^{ \circ }={ 135 }^{ \circ }$$
which is greater than $$90^{\circ}$$
So it is an obtuse angle .
Option $$B$$ is correct.
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