## Types of Symmetry:

They are Three types of Symmetry:

1. Line Symmetry is When an object is folded or reflected about a line, it completely overlap.
2. Rotational Symmetry is rotated in a certain direction around a point.
3. Translational Symmetry is when an object is relocated to another position while maintaining its original or exact orientation.Â

## Materials Required:

• Alphabet cards or printed alphabets
• Rulers
##### Procedure:
1. Provide each student with a set of alphabet cards or printed alphabets.
2. Instruct them to select an alphabet and place it on a flat surface.
3. Ask the students to identify two perpendicular lines that could potentially serve as lines of symmetry for the chosen alphabet.
4. Provide rulers and guide the students in placing the rulers along the identified lines.
5. Encourage the students to observe if the alphabet is symmetric when folded along these lines.
6. Discuss the results as a group, highlighting the presence or absence of symmetry in each case.

## Materials Required:

• Foam pieces of various shapes and sizes
• Mirror
##### Procedure:
1. Distribute foam pieces to each student.
2. Explain the concept of line symmetry and its relationship to shapes.
3. Challenge the students to create shapes with a specific number of lines of symmetry using the foam pieces.
4. Allow them to use mirrors to see the line of symmetry by placing on the shape vertically and observing the pattern .
5. Once the students have completed their shapes, have them present their creations to the class.
6. Engage in a discussion about the different shapes and the number of lines of symmetry they possess.

## Rotational Symmetry:

Degree of Rotational Symmetry: It is the angle through which the object is rotated look the same.

360 degree/ Order of Rotational Symmetry = Degree of Rotational Symmetry

Order of Rotational Symmetry : The Number of times the Shape Matches itself when you rotate it by 360 degrees.

## Materials Required:

• Geometric shapes (e.g., squares, rectangles, circles)
• Pencils
• Markers or colored pencils (for Activity 3b)
• Â
##### Procedure:

a) Finding the Order and Degree of Symmetry:

• Provide each student with geometric shapes.
• Instruct them to identify the order and degree of symmetry for each shape.
• Encourage them to draw lines of symmetry and make observations.
• Discuss the findings as a group, emphasizing the concepts of order and degree of symmetry.

## b) Finding the Order and Degree of Symmetry with Patterns:

• Repeat steps 1-3 from Activity 3a.
• This time, ask the students to draw patterns on the shapes using markers or colored pencils.
• Reassess the order and degree of symmetry, taking into account the added patterns.
• Facilitate a class discussion to compare the findings with the previous activity and explore the impact of patterns on symmetry.

## Materials Required:

• White cloth
• Marbles
• Different colored fabric dyes
• Plastic containers

## Procedure:

1. Instruct the students to fold the cloth in half to create a symmetrical shape.
2. Place marbles on one side of the cloth, ensuring they are evenly distributed.
3. Help the students gather the cloth around the marbles and secure it with thread to create patterns.
4. Prepare different fabric dyes in plastic containers according to the instructions on the packaging.
5. Encourage the students to dip the cloth in the dyes, ensuring both sides receive equal exposure.
6. Allow the cloth to dry, then remove the marbles and unfold the fabric.
7. Observe and discuss the line symmetry patterns obtained from the tie and dye process.

# Counting in Groups

#### Conclusion:

Â These engaging activities have provided high school teachers and homeschooling parents with a variety of ways to teach and demonstrate rotational symmetry to their students. By incorporating hands-on experiences and discussions, you can ensure a deeper understanding of this mathematical concept. Have fun exploring symmetry with your students and encouraging their creativity!