RBSE Solutions for Class 7 Maths Chapter 14 Symmetry Intext Questions

Rajasthan Board RBSE Solutions for Class 7 Maths Chapter 14 Symmetry Intext Questions Textbook Exercise Questions and Answers.

RBSE Class 7 Maths Solutions Chapter 14 Symmetry Intext Questions

(Try These Page No: 272)

Question 1.
(a) Can you now tell the. .order of the rotational symmetry for an equilateral triangle? (Look at the following figures:)

Answer:
It has a rotational symmetry of order 3 because at three positions the triangle looks the same.

(b) How many positions are there at which the triangle looks exactly the same when rotated about its centre by 120°? 
Answer:
Three positions.

Question 2.
Which of the following shapes have rotational symmetry about the marked point?

Answer:
All of the above shapes (i), (ii), (iii) and (iv) have rotational symmetry about the marked point.

(Try These Page No: 273)

Question 1.
Give the order of the rotational symmetry of the given figures about the point marked:
(i)

Answer:
Order of rotational symmetry is 4.

(ii)

Answer:
Order of rotational symmetry is 3.

(iii)

Answer:
Order of rotational symmetry is 2.

(Do This: Page No: 275)

Question 1.
Some of the English alphabets have fascinating symmetrical structure. Which capital letters have just one line of symmetry (like E)? Which capital letters have a rotational symmetry of order 2 (like I)? By attempting to think on such lines, you will be able to fill in the following table:

Answer: