Chapter 13 Symmetry Ex 13.1
Question 1.
List any four symmetrical objects from your home or school.
Solution:
The following objects can be symmetrical:
(a) Notebook
(b) Dinning table
(c) A blackboard
(d) Wall clock
(e) A pair of scissors
Question 2.
For the given figure, which one is the mirror line, l1 or l2?
Solution:
In the following figure, l2 is the mirror line.
Question 3.
Identify the shapes given below. Check whether they are symmetrical or not. Draw the line of symmetry as well.
Solution:
(a) The given symmetric figure is a lock in which vertical line ‘l’ is the line of symmetry.
(b) The given figure is a symmetrical bucket in which vertical line ‘l’ is the line of symmetry.
(c) The given figure is not symmetrical.
(d) The given figure is a symmetric telephone in which vertical line l is called the line of symmetry.
(e) The given figure is symmetrical. Horizontal line l is called the line of symmetry.
(f) The given figure is symmetrical. Vertical line l is called its line of symmetry.
Question 4.
Copy the following on a squared paper. A square paper is what you would have used in your arithmetic notebook is earlier classes. Then complete them such that the dotted line is the line of symmetry.
Solution:
Question 5.
In the figure, l is the line of symmetry. Complete the diagram to make it symmetric.
Solution:
The completed figure is as follows:
Question 6.
In the figure, l is the line of symmetry. Draw the image of the triangle and complete the diagram so that it becomes symmetric.
Solution:
The symmetric figure is given as follows.
JEE Main Application Fee
JEE Main Application Fees For Centres in India | General/OBC | ST/SC/PWD | |
Either Paper I or Paper II | Boys | Rs. 1000 | Rs. 500 |
Girls | Rs. 500 | Rs. 500 | |
Both Paper I or Paper II | Boys | Rs. 1800 | Rs. 900 |
Girls | Rs. 900 | Rs. 900 | |
JEE Main Application Fees For Centres in Foreign Country | General/OBC | ST/SC/PWD | |
Either Paper I or Paper II | Boys | Rs. 2500 | Rs. 1250 |
Girls | Rs. 1250 | Rs. 1250 | |
Both Paper I or Paper II | Boys | Rs. 3800 | Rs. 1900 |
Girls | Rs. 1900 | Rs. 1900 |