Page 143 - Revised Maths Wisdom Class - 6

Symmetry 141

2. Is the mirror line, a line of symmetry? _____

3. Is there any change in shape or length of any side of DABC after reflection? _____
4. Can you find any difference between the figure and its mirror image? _____

So, we conclude that when an object is reflected:
 There is no change in the measurement.
 There is no change in the angle.
 The image is as far behind the mirror as the object is in front of the mirror.
 The left side of the object appears on the right side in its mirror image and vice versa.

ILLUSTRATIONS

Example 1: Draw the mirror image of the following letters.

(a) (b) (c)

Solution: (a) (b) (c)

Example 2: Complete the patterns using reflectional symmetry.

(a) (b) (c) (d)

Solution:

(a) (b) (c) (d)