UrbanPro
true

Find the best tutors and institutes for Class 7 Tuition

Find Best Class 7 Tuition

Please select a Category.

Please select a Locality.

No matching category found.

No matching Locality found.

Outside India?

Learn Exercise 14.3 with Free Lessons & Tips

Draw, wherever possible, a rough sketch of

(i) a triangle with both line and rotational symmetries of order more than 1.

(ii) a triangle with only line symmetry and no rotational symmetry of order more than 1.

(iii) a quadrilateral with a rotational symmetry of order more than 1 but not a line symmetry.

(iv) a quadrilateral with line symmetry but not a rotational symmetry of order more than 1.

(i) Equilateral triangle has 3 lines of symmetry and rotational symmetry of

order 3.

(ii) Isosceles triangle has only 1 line of symmetry and no rotational symmetry of order more than 1.

(iii) A parallelogram is a quadrilateral which has no line of symmetry but a rotational symmetry of order 2.

(iv)A kite is a quadrilateral which has only 1 line of symmetry and no rotational symmetry of order more than 1.

Comments

If a figure has two or more lines of symmetry, should it have rotational symmetry of order more than 1?

Yes. If a figure has two or more lines of symmetry, then it will definitely have its rotational symmetry of order more than 1.

Comments

Fill in the blanks:

The given table can be completed as follows.

Shape

Centre of Rotation

Order of Rotation

Angle of Rotation

Square

Intersection point of diagonals

4

90º

Rectangle

Intersection point of diagonals

2

180º

Rhombus

Intersection point of diagonals

2

180º

Equilateral Triangle

Intersection point of medians

3

120º

Regular Hexagon

Intersection point of diagonals

6

60º

Circle

Centre

Infinite

Any angle

Semi-circle

Centre

1

360º

Comments

Name the quadrilaterals which have both line and rotational symmetry of order more than 1.

Square, rectangle, and rhombus are the quadrilaterals which have both line and rotational symmetry of order more than 1. A square has 4 lines of symmetry and rotational symmetry of order 4. A rectangle has 2 lines of symmetry and rotational symmetry of order 2. A rhombus has 2 lines of symmetry and rotational symmetry of order 2.

Comments

After rotating by 60° about a centre, a figure looks exactly the same as its original position. At what other angles will this happen for the figure?

It can be observed that if a figure looks symmetrical on rotating by 60º, then it will also look symmetrical on rotating by 120º, 180º, 240º, 300º, and 360º i.e., further multiples of 60º.

Comments

Can we have a rotational symmetry of order more than 1 whose angle of rotation is

(i) 45°?

(ii) 17°?

 
 
 
 

It can be observed that if the angle of rotation of a figure is a factor of 360º, then it will have a rotational symmetry of order more than 1.

It can be checked that 45º is a factor of 360º but 17º is not. Therefore, the figure having its angle of rotation as 45º will have its rotational symmetry of order more than 1. However, the figure having its angle of rotation as 17º will not be having its rotational symmetry of order more than 1.

Comments

Name any two figures that have both line symmetry and rotational symmetry.

Equilateral triangle and regular hexagon have both line of symmetry and rotational symmetry.

Comments

How helpful was it?

How can we Improve it?

Please tell us how it changed your life *

Please enter your feedback

Please enter your question below and we will send it to our tutor communities to answer it *

Please enter your question

Please select your tags

Please select a tag

Name *

Enter a valid name.

Email *

Enter a valid email.

Email or Mobile Number: *

Please enter your email or mobile number

Sorry, this phone number is not verified, Please login with your email Id.

Password: *

Please enter your password

By Signing Up, you agree to our Terms of Use & Privacy Policy

Thanks for your feedback

About UrbanPro

UrbanPro.com helps you to connect with the best Class 7 Tuition in India. Post Your Requirement today and get connected.

X

Looking for Class 7 Tuition Classes?

Find best tutors for Class 7 Tuition Classes by posting a requirement.

  • Post a learning requirement
  • Get customized responses
  • Compare and select the best

Looking for Class 7 Tuition Classes?

Get started now, by booking a Free Demo Class

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more