Understanding Elementary Shapes Test

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Understanding Elementary Shapes Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

The number of sides of a regular polygon, if each of its interior angles is $$135^{\circ}$$, is given by:

A
$$4$$

B
$$6$$

C
$$8$$

D
$$10$$

Solution

Angle of a regular polygon is given by: $$\cfrac{n-2}{n}\times 180=135$$ where $$n$$ is the number of sides of the polygon
Therefore, $$180n - 360 = 135n$$
$$n =8$$ sides
Question 2
1 / -0

A cube is a special type of cuboid is

A
True

B
False

C
Anomalous

D
None of these

Solution

A cube is a special type of cuboid whose length, breadth and height, all dimensions are equal.
Question 3
1 / -0

Name the angle formed at each corner of an envelope.

A
Acute angle

B
Obtuse angle

C
Right angle

D
Straight angle

Solution

The envelope is nothing but rectangular in shape
$$\therefore$$ Each corner angle of Envelope is $$90^o$$ i.e. right angle.
Question 4
1 / -0

Fill in the blanks with the correct word from the options given.
Vertical angles are .......... right angles.

A
Always

B
Never

C
Sometimes

D
Data Insufficient

Solution

Vertical angles can be sometime right angle as shown in the figure.
So option $$C$$ is correct.
Question 5
1 / -0

The side faces of a pyramid are

A
triangles

B
squares

C
polygons

D
trapeziums

Solution

As can be observed from the figure in the question, we can see that the side faces of a pyramid are triangles
Question 6
1 / -0

$$\displaystyle \angle AOB$$ is a / an _____________ angle.

A
acute

B
right

C
obtuse

D
none of these

Solution

An obtuse angle is one which measures more than $$90^o$$ but less than $$180^o$$.
Question 7
1 / -0

The number of dimensions, a surface has

A
$$1$$

B
$$2$$

C
$$3$$

D
$$0$$

Solution

A surface is a continuous set of points that has length and breadth but no thickness.
So a surface has two dimensions.
Question 8
1 / -0

Boundary of solid are called?

A
Surfaces

B
Curves

C
Lines

D
Points

Solution

The boundary of the solids are called surfaces.
Question 9
1 / -0

The $${\triangle }$$ formed by BC =7.2 cm , AC =6 cm and $${\angle C}$$ = $${120^0}$$ is:

A
An acute angle $${\triangle }$$

B
An obtuse angled $${\triangle }$$

C
A right angled $${\triangle }$$

D
None of these

Solution

Given $$\angle C=120^{\circ}$$
Here one of the angles of the triangle is greater than $$90^{\circ}$$ . So the $$\triangle$$ is obtuse angled triangle.
Therefore option $$B$$ is correct.
Question 10
1 / -0

Each angle of a square is of measure ___ .

A
$$\displaystyle 30^{\circ}$$

B
$$\displaystyle 45^{\circ}$$

C
$$\displaystyle 60^{\circ}$$

D
$$\displaystyle 90^{\circ}$$

Solution

Each angle of a square is of measure $$ {90}^{o} $$

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Re-Attempt Weekly Quiz Competition

Understanding Elementary Shapes Test - 7

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Understanding Elementary Shapes Test - 7

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SHARING IS CARING

Question 1

$$4$$

$$6$$

$$8$$

$$10$$

Solution

Question 2

True

False

Anomalous

None of these

Solution

Question 3

Acute angle

Obtuse angle

Right angle

Straight angle

Solution

Question 4

Always

Never

Sometimes

Data Insufficient

Solution

Question 5

triangles

squares

polygons

trapeziums

Solution

Question 6

acute

right

obtuse

none of these

Solution

Question 7

$$1$$

$$2$$

$$3$$

$$0$$

Solution

Question 8

Surfaces

Curves

Lines

Points

Solution

Question 9

An acute angle $${\triangle }$$

An obtuse angled $${\triangle }$$

A right angled $${\triangle }$$

None of these

Solution

Question 10

$$\displaystyle 30^{\circ}$$

$$\displaystyle 45^{\circ}$$

$$\displaystyle 60^{\circ}$$

$$\displaystyle 90^{\circ}$$

Solution

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