Understanding Elementary Shapes Test

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Understanding Elementary Shapes Test - 9

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Weekly Quiz Competition

Question 1
1 / -0

Number of right angles formed in the given figure is:

A
$$5$$

B
$$3$$

C
$$2$$

D
$$4$$

Solution

There are four right angles in the figure which are $$ \angle PSR, \angle SRQ , \angle RQP , \angle QPS $$
Question 2
1 / -0

An angle which measures $$\displaystyle 90^{\circ}$$ is called

A
Obtuse angle

B
Acute angle

C
Right angle

D
None of these

Solution

An angle which measures $$ {90}^{o} $$ is called a right angle.
Question 3
1 / -0

An angle which measures more than $$\displaystyle 0^{\circ}$$ and less than $$\displaystyle 90^{\circ}$$ is called

A
obtuse

B
acute

C
right

D
none of these

Solution

Angles which measure more than $$ {0}^{o} $$ and less than $$ {90}^{o} $$ are acute angles.
Question 4
1 / -0

How many edges does the following figure have?

A
12

B
8

C
6

D
4

Solution

By observing the figure it can be clearly said that the following figure have 8 edges.
Question 5
1 / -0

In a right angled triangle, the other two angles are:

A
acute

B
obtuse

C
right

D
none of these

Solution

An acute angle is an angle smaller than a right angle $$(90^{o}$$ is called a right angle$$).$$ Hence, in a right angled triangle the other two angles are acute.
Question 6
1 / -0

Instrument used to measure or construct angles is

A
Compass

B
Scale

C
Protractor

D
Set Square

Solution

An instrument used to measure or construct angles is a protractor.
Question 7
1 / -0

Angles are measured in

A
compasses

B
protractor

C
degrees

D
centimetres

Solution

Angles are measured in degrees
Question 8
1 / -0

Choose the false statement from the following?

A
A cuboid has $$3$$ pairs of opposite faces.

B
The number of vertices of a cube is $$6$$.

C
All sides of a square are equal.

D
Cuboid is a three dimensional figure.

Solution

Statement B is false. Because a cube has $$8$$ vertices.
Question 9
1 / -0

Which of the following is the BEST example of a sphere?

A

B

C

D

Solution

From the given options, ball is an example of a sphere.
We know, a sphere is a three dimensional figure, which is made up of all points in the space, which lie at a constant distance called radius, from a fixed point called the centre of the sphere.

Hence, option $$A$$ is correct.
Question 10
1 / -0

An angle which is more than $$180^{\circ}$$ and less than $$360^{\circ}$$ is called:

A
obtuse angle

B
right angle

C
reflex angle

D
complete angle

Solution

By definition, we know, an angle which is more than $$180^o$$ and less than $$360^o$$ is called reflex angle.
That is, an angle 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.