Page 175 - New Medley 5 Semester 2

Example 1: Find the mirror image of the line segment AB along the
mirror M.

Solution: Given, M represents the mirror. Take a line segment AB

on one side of the mirror M. We can follow these steps:

  Draw lines AL and BN each perpendicular to mirror M.

  Then, extend AL to P and BN to Q M
A P
so that AL = PL and BN = QN. L

  Now, join P to Q.

Thus, PQ is the reflection of AB

along the mirror M.
B N Q
EXERCISE 8.1

A. Write the letters of English alphabet which has:

1. One line of symmetry

2. Two lines of symmetry

3. No line of symmetry

B. Do any numbers from 0 to 9 have line(s) of symmetry? Write them.

C. Write the name of some symmetrical objects from your surroundings.

D. Draw the line(s) of symmetry of the following solids.

1. 2. 3. 4.

E. Which of the following figures are the reflection along the mirror line M?
1. M 2. M 3.
A A′
L X′
X
M′ Y
B B′ Y′
L′

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