Page 143 - Math Genius C5

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\\October 8, 2025 12:37 PM Bharat Arora P-9 Reader _________________________ Date: ___________________74

1. draw the line of symmetry on each given figure.

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

2. draw the reflection of each given shape along the mirror line.

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

3. Study the following number patterns and fill in the missing numbers.

( a) 12, 17, ___, ___, 32, 37, ___, 47 (b) 55, ___, 49, 46, 43, 40, 37, ___
4. decode the following messages with the letters as per their position.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

( a) 1 12 12 9 19 23 5 12 12 (b) 23 15 18 11 8 1 18 4
Symmetry Around uS

We know that a figure or a shape is said to be symmetrical, FACTS
if it can be divided into two identical parts by an imaginary The word ‘Symmetry’ comes from

line. This phenomenon is called symmetry. the Greek words syn (meaning
“together”) and metron (meaning
The imaginary line is known as the line of symmetry. “measure”). So, it literally means “to
measure together,” which perfectly
We can see many symmetrical objects in our daily life. describes how the two halves of a

Observe the following. symmetrical shape match up.

In the given figures, a line is dividing the figures into two equal halves. This line is called
the line of symmetry.

Line of Symmetry

An imaginary line which divides an object or a figure into two identical halves is called a
line of symmetry.

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