A or B (depends on the type of polygon)

MCQ Questions for Class 6 Maths Understanding Elementary Shapes Quiz 5

The ______ angles of a polygon are the angles at each vertex on the inside of the polygon.

0%
interior
0%
exterior
0%
diagonal
0%
curves

If a polygon has equal angles and equal sides it is a _____ polygon.

0%
regular
0%
irregular
0%
curved
0%
none of the above

Explanation

A regular polygon has all sides and angles of equal measures.
Therefore,

$A$ is the correct answer.

Which of the following is a regular polygon?

0%
Any triangle
0%
Equilateral traingle
0%
Isosceles right triange
0%
None of these

The interior of a closed figure is covered by its _____.

0%
space
0%
boundary
0%
diagonal
0%
None of the above

A line segment connecting two opposite vertices (Non-adjacent vertices) of a polygon is called a _____.

0%
vertices
0%
edge
0%
segment
0%
diagonal

Diagonals are

0%
curves
0%
line segments
0%
A or B (depends on the type of polygon)
0%
None of these

Square is an example of ................. polygon

0%
curved
0%
irregular
0%
regular
0%
None of the above

Explanation

All sides and angles are equal of a regular plolygon.
Therefore,

$C$ is the correct answer

When the side of the polygon is extended, we get an angle formed by the extended side and the side of a polygon is called the _____ angle.

0%
interior
0%
supplementary
0%
complementary
0%
exterior

................... is equilateral and equiangular.

0%
Rectangle
0%
Scalene triangle
0%
Square
0%
Kite

Which of the following is an example of

$\text{3D}$ ?

0%
Circle
0%
Sphere
0%
Rectangle
0%
Triangle

Explanation

From the given options, circle, rectangle and triangle are

$\text{2D}$ figures.

Hence, sphere is a

$\text{3D}$ figure.

So, option B is correct.

How many sides does a pentagon have?

0%
2
0%
5
0%
6
0%
7

Explanation

A polygon has as many angles as sides.

Like, triangle has

$3$ angles and

$3$ sides.

A pentagon means a polygon which has

$5$ sides and

$5$ angles.

Hence, option B is correct.

A polygon with minimum number of sides is called as ?

0%
pentagon
0%
square
0%
triangle
0%
angle

Explanation

A polygon cannot be formed with just two lines or line segments.

Hence, a minimum number of

$3$ lines or line segments are required to form a polygon.

Such type of a polygon is called a triangle.

So, option

$C$ is correct.

Solid figures are in:

0%
$3D$
0%
$2D$
0%
$1D$
0%
$4D$

Which of following is an example of 2 dimensions?

0%
Cuboid
0%
Cone
0%
Sphere
0%
Circle

Explanation

From the given options, cuboid, cube and sphere are

$3$ -dimensional objects.

Hence, circle is a

$2$ -dimensional figure.

So, option D is correct.

What is the name of the closed figure with four sides?

0%
Hexagon
0%
Triangle
0%
Pentagon
0%
Quadrilateral

Explanation

A quadrilateral is a closed figure having four sides.

Therefore,

$D$ is the correct answer.

A parallelogram is a quadrilateral whose ...................... sides are parallel.

0%
adjacent
0%
congruent
0%
opposite
0%
linear

Explanation

A parallelogram is a quadrilateral which has

$4$ sides whose opposite sides are equal and parallel. It has

$2$ pairs of parallel and equal sides.
Therefore, C is the correct answer.

Plane figures are in

0%
$3D$
0%
$2D$
0%
$1D$
0%
$4D$

Explanation

The figures that can be drawn on a piece of paper are called

$2D$ figures.

For eg., rectangle, square, circle, etc.

So, option B is correct.

A parallelogram each of whose angle measures

$90^\circ$ is

0%
Rectangle
0%
Rhombus
0%
Triangle
0%
Trapezium

Explanation

In a parallelogram,

Both the pair of opposite sides are of equal length.

Opposite angles are equal and two adjacent angles are supplementary.

A rectangle is a parallelogram, in which each angle measures

$90^{o}$ .

Hence, a parallelogram each of whose angle measures

$90^{o}$ is a rectangle.

A regular polygon with

$10$ sides is known as ?

0%
Heptagon
0%
Decagon
0%
Septagon
0%
Octagon

Explanation

$10$ sided figure is called Decagon.
Therefore,

$B$ is the correct answer.

Which of the following are acute angles?

0%
a and c
0%
a and b
0%
c and d
0%
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:

0%
Reflex angle
0%
Straight angle
0%
Obtuse angle
0%
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

$\displaystyle {360 }^{ o }$ .

Which one of the following is not an acute scalene triangle?

Range of an obtuse angle is:

0%
$[0˚, 90˚)$
0%
$(0˚, 90˚]$
0%
$[90˚, 180˚)$
0%
$(90˚, 180˚)$

Explanation

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.

0%
$8$
0%
$9$
0%
$10$
0%
$7$

Explanation

One right angle =

$\displaystyle { 90 }^{ o }$
Sum of right angle =

$\displaystyle { 720 }^{ o }$
No. of right angles =

$\displaystyle \frac { { 720 }^{ o } }{ { 90 }^{ o } } ={ 8 }$

Which of the following is obtuse angle?

0%
Two right angles
0%
One and half right angles
0%
One right angle
0%
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.

A parallelogram with equal angles is called a ..............................

0%
triangle
0%
kite
0%
rectangle
0%
rhombus

Explanation

$Rectangle$ is the only parallelogram which like a parallelogram has opposite sides parallel and all angles

$equal$ .
Therefore, C is the correct answer.

What is the range of reflex angle?

0%
Greater than zero but less than $\displaystyle { 90 }^{ o }$
0%
Greater than $\displaystyle { 90 }^{ o }$ but less than $\displaystyle { 180 }^{ o }$
0%
Greater than $\displaystyle { 180 }^{ o }$ but less than $\displaystyle { 360 }^{ o }$
0%
Equal to $\displaystyle { 360 }^{ o }$

Explanation

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

$90^o$ .

Now, by definition, reflex angle is the angle which is greater than

$\displaystyle {180}^{ o }$ and less than

$\displaystyle {360 }^{ o }$ .

That is, angles larger than a straight angle but less than

$1$ turn (between

$180^o$ and

$360^o$ ) are called reflex angles.

Therefore, the range of reflex angle is greater than

$180^o$ but less than

$360^o$ .

Hence, option

$C$ is correct.

Sum of two obtuse angle results in:

0%
Acute angle
0%
Right angle
0%
Obtuse angle
0%
Reflex angle

Explanation

Obtuse angle ranges from

$\displaystyle { 90 }^{ o }$ to

$\displaystyle { 180 }^{ o }$
So, sum of least obtuse angle is

$\displaystyle { 91 }^{ o }+{ 91 }^{ o }={ 182 }^{ o }$ , which is a reflex angle.
Now, sum of maximum obtuse angle is

$\displaystyle { 179 }^{ o }+{ 179 }^{ o }={ 358 }^{ o }$ , which is also a reflex 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

$\displaystyle {360 }^{ o }$ .

Which of the following is not an obtuse angle ?

0%
$\displaystyle { 127 }^{ o }$
0%
$\displaystyle { 149 }^{ o }$
0%
$\displaystyle { 175 }^{ o }$
0%
$\displaystyle { 182 }^{ o }$

Explanation

Acute angle is the angle which is greater than

$\displaystyle { 0 }^{ \circ }$ and less than

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

Obtuse angle is the angle which is greater than

$\displaystyle { 90}^{ \circ }$ and less than

$\displaystyle {180 }^{ \circ }$ .

Right angle is the angle which is equal to

$90^{\circ}$ .

Reflex angle is the angle which is greater than

$\displaystyle {180}^{ \circ }$ and less than

$\displaystyle {360 }^{ \circ }$ .

$\therefore \displaystyle { 182 }^{ \circ }$ is a reflex angle, so it is not an obtuse angle.

A quadrilateral whose all sides are equal and has four right angles is called a ____ .

0%
rectangle
0%
rhombus
0%
kite
0%
square

CBSE Questions for Class 6 Maths Understanding Elementary Shapes Quiz 5 - MCQExams.com

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Practice Class 6 Maths Quiz Questions and Answers

CBSE Questions for Class 6 Maths Understanding Elementary Shapes Quiz 5 - MCQExams.com

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Practice Class 6 Maths Quiz Questions and Answers

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