Understanding Elementary Shapes Test

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Understanding Elementary Shapes Test - 31

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Question 1
1 / -0

How many angles are less than $$90^o$$ inside the given figures?

A
$$2$$

B
$$3$$

C
$$4$$

D
$$5$$

Solution

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.
Question 2
1 / -0

How many right angles are there on the outside of the figure shown?

A
$$2$$

B
$$4$$

C
$$6$$

D
$$8$$

Solution

Given:
Refer image,
Three are total $$8$$.
Right angles on the outside of the figures.
$$\therefore$$ Option D.$$8$$ is correct
Question 3
1 / -0

A cuboidal box has _______ corner points.

A
$$10$$

B
$$6$$

C
$$12$$

D
$$8$$
Question 4
1 / -0

The angle between two opposite rays is ________.

A
Right

B
Obtuse

C
Acute

D
Straight

Solution
Question 5
1 / -0

Which of the following is an obtuse angle?

A
$$92^{\circ}$$

B
$$181^{\circ}$$

C
$$195^{\circ}$$

D
$$83^{\circ}$$
Question 6
1 / -0

What shape are the faces of a cube?

A
Circle

B
Triangle

C
Square

D
Pentagon
Question 7
1 / -0

How many faces, edges and vertices respectively does the given solid have?

A
$$8, 12, 18$$

B
$$10, 18, 12$$

C
$$8, 18, 12$$

D
$$10, 12, 18$$

Solution

Number of faces $$= 8$$
Number of edges $$= 18$$
Number of vertices $$= 12$$.
Question 8
1 / -0

Two positions of a dice are shown below. If the face with $$1$$ dot is at the bottom, then the number of dots on the top face is

A
$$2$$

B
$$3$$

C
$$4$$

D
$$5$$

Solution

Given (Ref. image 1)

Find : Dots on the top when $$1$$ dot is at the bottom.

Solution : By seeing both dices we find two faces have same $$3$$ dots.

So Rearrange the dices dots in clockwise.

Here dots $$3$$ are same and different No. of dots are opposite in Both dices respectively as $$5 \leftrightarrow 6 \, ; \, 4 \leftrightarrow 2$$ so Remaining $$3$$ dots are opposite to $$1$$ dot.

Hence the correct answer is option B.
Question 9
1 / -0

The number of corners, edges, and faces of a cuboid respectively are

A

$$8,6,12$$

B
$$4,3,6$$

C
$$4,4,10$$

D
$$8,4,12$$

Solution

A cuboid has $$8$$ corners/vertices, $$12$$ edges and $$6$$ faces.
Hence, option $$A$$ is correct.
Question 10
1 / -0

Mark the correct alternative of the following.
The number of degrees in $$3$$ right angles is?

A
$$180^o$$

B
$$360^o$$

C
$$270^o$$

D
$$90^o$$

Solution

As we know $$1$$ right angle$$=90^o$$.
So $$3$$ right angles $$=3\times 90^o=270^o$$.