Chapter 13 Symmetry Ex 13.1

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.

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