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CBSE Questions for Class 5 Maths Shapes And Angles Quiz 3 - MCQExams.com
CBSE
Class 5 Maths
Shapes And Angles
Quiz 3
Choose the correct option.
$$20^{\circ}$$ is
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Acute angle
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Obtuse
angle
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Reflex
angle
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None of these
Choose the correct option.
$$60^{\circ}$$ is
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Acute angle
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Obtuse
angle
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Reflex
angle
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none of these
Choose the correct option:-
$$200^{\circ}$$ is ________.
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Acute $$\angle$$
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Obtuse $$\angle$$
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Reflex $$\angle$$
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none of these
Explanation
The given measure of angle is $$200^o.$$
We know, reflex angles are angles measuring greater than $$180^o$$ and less than $$360^o.$$
$$\therefore$$ $$200^o$$ is a reflex angle.
Hence, option $$C$$ is correct.
The measure of an acute angle is always $$< 90^{o}$$.
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True
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False
Explanation
Acute angles are the angles whose measurements fall between $$0$$ and $$90 $$ degrees.
$$\therefore$$ The above statement is true.
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
Explanation
As evident from the picture in question and comparing with the above picture, we can come to the conclusion that the angle depicted in qn is more than a right angle.
If the sum of two angles is greater than $$ 180^{\circ} $$, then which of the following is not possible
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two obtuse angles
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two right angles
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one obtuse and one acute angle
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one reflex and one acute angle
Explanation
$$(B)$$ Two right angles, as the sum will be $$180^\circ$$ only.
Open any two adjacent fingers of your hand. What kind of angle you get
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acute
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right
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obtuse
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straight
Explanation
We get an acute angle.
Two acute angles are congruent.
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True
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False
Explanation
False
Two acute angles may vary from $$0^{\mathring{}}$$ to $$89^{\mathring{}}$$. Hence, acute angles having different measures are not congruent.
State whether the following statement are true or false :
'An angle Whose measure is greater than that of right angle is obtuse'.
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True
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False
Explanation
False, because the angle can be obtuse, straight, reflex or complete.
If the sum of two angles is equal to an obtuse angle, then which of the following is not possible?
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One obtuse angle and one acute angle
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One right angle and one acute angle
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Two acute angles
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Two right angles
Explanation
Option [D] is the correct answer.
The sum of two right angles is exactly equal to $${180}^{o}$$, which is a straight angle not an obtuse angle.
If the sum of two angles is an obtuse angle, then which of the following is not possible :
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two acute angles
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one obtuse angles one acute angle
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two acute angles
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two right angles
Explanation
Two right angles (d), as the sum will result in a straight angle, which is not obtuse.
Define a right angle.
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A right angle is an internal angle which is equal to $$90^o$$.
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An angle as in a corner of a square, or formed by dividing a circle into quarters.
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The sum of two acute angles is a right angle.
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None of these
Explanation
Measure of right triangle is $$90^{\circ}$$
So option $$A$$ is correct.
Also the angle formed at the corner of square and centre of quarter circle is $$90^{\circ}$$
So option $$B$$ is also correct.
Sum of two acute angles is not always right angle.
So $$C$$ is not correct.
In given figure which one of the following angle is a straight angle
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$$\angle AOB$$
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$$\angle AOD$$
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$$\angle BOC$$
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$$\angle BOD$$
Explanation
Straight angle is equal to $$180^o$$.
So, $$\angle BOD$$ and $$\angle AOC$$ are straight angles.
The angle formed by the pages of an open book is:
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Acute
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Obtuse
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Right
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Straight
Explanation
The angle formed by the pages of an open book is obtuse.
Since the angle will always be more than $$90$$ but less than $$180$$.
A reflex angle is .........a straight angle.
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Smaller than
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Larger than
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Equal to
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One-half of
Line $$\text{AD}$$ and the point $$\text{R}$$ lie in the same plane.
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True
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Flase
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Data is insufficient
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None of the above
Which of the following is an obtuse angle ?
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$$92^\circ$$
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$$181^\circ$$
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$$195^\circ$$
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$$83^\circ$$
The sum of two acute angles can be:
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Acute angles
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Obtuse angles
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Right angles
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All of the above
Explanation
Let one angle is $$\displaystyle { 30 }^{ o }$$ and the other angle is $$\displaystyle { 40 }^{ o }$$ then sum is $$\displaystyle { 70 }^{ o }$$. which is an acute angle.
Let one angle is $$\displaystyle { 70 }^{ o }$$ and other angle is $$\displaystyle { 80 }^{ o }$$, then sum is $$\displaystyle { 150 }^{ o }$$ which is a obtuse angle.
Let one angle is $$\displaystyle { 45 }^{ o }$$ and another angle is $$\displaystyle { 45 }^{ o }$$ then sum is $$\displaystyle { 90 }^{ o }$$ which is a right angle.
So correct answer is $$(D)$$
When the clock shows time $$5:20$$, the angle formed between the two hands is
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obtuse
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right
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acute
0%
none of these
Explanation
Angles
between $$ {0}^{o} $$ and $$ {90}^{o} $$ are acute angles.
Since at the time $$ 5:20$$, the hands of the clock form an angle less than $$ {90}^{o} $$, the angle formed between the two hands is an acute angle.
What type of angle is angle X?
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Acute
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Obtuse
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Right
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Straight
How many angles are less than $$90^o$$ inside the given figures?
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$$2$$
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$$3$$
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$$4$$
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$$5$$
Explanation
Given,
Refer Fig.
Here $$\angle ABF,\angle BFC$$ and $$\angle FCD$$ is less than $$90^0$$.
So total $$3$$ angles are $$<90^0$$
option B is correct.
Write 'True' or 'False'.
A straight angle measures $$90^o$$
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0%
True
0%
False
Explanation
Given $$\rightarrow$$ A straight angle measures $$90^{\circ}$$
To find $$\rightarrow$$ Whether the given statement is true or false.
A straight angle measures $$180^{\circ}$$. In radian it is measured as $$\pi $$ angle.
Therefore, the given statement is false.
Correct option is B.
How many right angles are there on the outside of the figure shown?
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$$2$$
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$$4$$
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$$6$$
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$$8$$
Explanation
Given:
Refer image,
Three are total $$8$$.
Right angles on the outside of the figures.
$$\therefore$$ Option D.$$8$$ is correct
The angle between two opposite rays is ________.
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Right
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Obtuse
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Acute
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Straight
Which of the following is an obtuse angle?
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$$92^{\circ}$$
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$$181^{\circ}$$
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$$195^{\circ}$$
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$$83^{\circ}$$
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
0%
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
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More than Right angle
0%
None of these
Explanation
As evident from the picture, it can be seen that the angle is less than $$90^0$$ or right angle.
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
Mark the correct alternative of the following.
An angle of measure $$140^o$$ is?
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An acute angle
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An obtuse angle
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A straight angle
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A complete angle
Explanation
An angle that measures $$<180^o$$ but $$>90^o$$ is called an obtuse angle.
Here it is given $$140^o$$, so it is an obtuse angle.
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