The Surajkund Fair Chapter Notes | Mathematics for Class 3 (Maths Mela) PDF Download

Introduction

Imagine you're exploring a world full of shapes, patterns, and fun designs.

Soni and Avi are going to the famous Surajkund fair in Faridabad with their grandparents, where the fair is filled with exciting stalls, games, and activities. In this chapter, we will learn about the things they see at the fair, like symmetrical objects, patterns, and making malas, while also discovering the magic of shapes and directions that make everything more organized and exciting!

Understanding Symmetry

Example: A butterfly has symmetry because if you draw a line down the middle, both wingslook the same.

Line of Symmetry:

A line of symmetry is a special imaginary line that divides a shape into two equal parts. When you fold the shape along this line, both sides match perfectly. Any object may have one or more than one Line of Symmetry.

For Example:

• Square: Has four lines of symmetry.
• Rectangle: Has two lines of symmetry.
• Equilateral Triangle: Has three lines of symmetry.

Let's explore more  objects and understand their Symmetry.

Some objects in the figures above are Symmetric, meaning that if the figure is cut along the dotted line, both halves will be equal when folded. Conversely, if a figure is cut along the dotted line and the resulting parts do not match when folded, then it is considered Asymmetric.

Mirror Images

• When we place an object in front of a mirror, we see its reflection, which is called a mirror image.
• In a mirror image, the right side of the object looks like the left side, and the left side looks like the right side.
• Combining an object and its mirror image creates symmetry, where both sides look the same.
• Mirror Images of Capital Letters and Numbers 

1. Certain letters and numbers have mirror images that look exactly like their original forms.
2. For example, letters like A, H, M, and numbers like 0 and 8 have mirror images that are the same as their original forms.

Making Malas (Bead Necklaces)

Soni and Avi stop at a stall where they see people making malas with beads. They learn how to create symmetrical malas using two different colored beads. A mala is symmetrical if both sides look the same when folded in half.

Rangolis and Patterns

Soni and Avi reach a stall of Tamil Nadu where they see beautiful rangoli designs. Some of the rangolis are symmetrical, and some are not. They learn to create their own symmetrical rangolis by folding paper and drawing identical designs on both sides.

Exploring the Fair with a Map

The chapter also teaches how to use maps. Soni and Avi follow a map to find their way around the fair. They learn to look at the signs and symbols to understand where places like the restaurant, shops, and play area are located.

Let's Understand using an example :

Soni and Avi were enjoying the Surajkund fair when they realized they couldn't find their Dada and Dadi. Suddenly, they heard an announcement: "Soni and Avi’s Dada and Dadi are waiting at the Chaupal for them." 

Excited but a bit lost, Soni and Avi decided to follow the directions on a map to find the Chaupal.

• They started by walking on the blue lane. 
• Next, they turned right onto the green lane. 
• Soon, they saw a restaurant on their right, but they remembered not to stop there. 
• They kept walking and took a left onto the red lane.
•  After that, they found the golden lane and took the first left turn. Along the way, they passed colorful stalls selling all kinds of exciting things.
• Finally, after following all the directions, they found the Chaupal and happily reunited with their Dada and Dadi, who were waiting for them with big smiles!

Soni and Avi followed the directions carefully and reached the Chaupal to find their grandparents. This adventure taught them how maps and directions can guide us in finding our way easily.

Soni and Avi’s visit to the Surajkund fair was not only full of fun but also a great learning experience. They learned about symmetry, making patterns, and using maps to find directions. The fair was a colorful and exciting place where they discovered the beauty of symmetry in the world around them.