Symmetry and Lines of Symmetry: Mirror, Mirror on the Wall!

Symmetry and Lines of Symmetry: Mirror, Mirror on the Wall!

Learning Objective

At the end of the lesson, you will be able to identify symmetry and determine lines of symmetry in various shapes.

What do you already know about symmetry and lines of symmetry?

What is Symmetry?

Symmetry is a balanced and identical arrangement of shapes or objects when divided into two equal parts.

Types of Symmetry

There are two types of symmetry: reflectional symmetry and rotational symmetry.

Reflectional Symmetry

Reflectional symmetry occurs when a shape can be divided into two equal parts by a line of reflection.

Identifying Lines of Symmetry

To identify lines of symmetry, fold the shape along a potential line of symmetry and check if both halves match exactly.

Examples of Lines of Symmetry

Shapes like squares, rectangles, and circles have multiple lines of symmetry, while irregular shapes may have none.

Interactive Activity: Symmetry Sorting

Drag and drop the shapes into the correct category: Symmetrical or Not Symmetrical.

Real-Life Symmetry

Symmetry is found in nature, art, architecture, and everyday objects. Look for symmetry around you!

Write down 3 things you learned in this lesson.

Have students enter three things they learned in this lesson. With this they can indicate their own learning efficiency of this lesson.

Write down 2 things you want to know more about.

Here, students enter two things they would like to know more about. This not only increases involvement, but also gives them more ownership.

Ask 1 question about something you haven't quite understood yet.

The students indicate here (in question form) with which part of the material they still have difficulty. For the teacher, this not only provides insight into the extent to which the students understand/master the material, but also a good starting point for the next lesson.