Symmetry
Objectives At the of this section, teachers should be able to: Explain how to identify and draw a line of symmetry Explain how to complete symmetrical figures Explain how to identify symmetrical figures
Objectives At the of this section, students should be able to: Identify and draw a line of symmetry Complete symmetrical figures Identify symmetrical figures
Starter Activity-Symmetrical Painting Note: Students are provided with paint and papers. Put drops of different colours on only half side of the paper and then fold it.
Activity 1-Painting Note: Ask students to unfold their papers. Ask them what they have observed-Discussion
Discussion
Activity 2 Teachers' Note: Ask students to collect different types of leaves. Ask them to fold one of the leaves into exactly two equal parts. Ask them what they can observe.
Activity 2 Teachers' Note: Ask students to unfold the leaf and discuss on what they have observed. 1. Tell the students to stick the leaf in their copybook and draw a dotted line in the middle. 2. Introduce the term “Symmetry” by explaining the meaning of this dotted line.
Activity 2 A figure which has line(s) of symmetry is known as a symmetrical figure.
Activity 3 Which of these figures is a symmetrical figure? Teachers note: Pair up the students. Give each group these two diagrams. Ask students to cut them off and repeat the steps of folding and unfolding. Discuss the results together
Consolidation Work Note: Book – Page 87
Let’s Practice – Activity 4 Complete the shading of this symmetrical figure.
Activity 5 Complete the shape which has one line of symmetry
Activity 6 Complete the shape to be able satisfy the line of symmetry
Activity 7 Complete the shading to be able satisfy the line of symmetry
More than one line of symmetry Let’s discuss: Can a shape have more than one line of symmetry? Let us take a flower.
More than one line of symmetry
More than one line of symmetry Try others by yourself
More than one line of symmetry Two Three Four Five
Consolidation Work Note: Book – Page 87
Consolidation Work A square has…………… line(s) of symmetry. 2 1 4 3 1.
Consolidation Work Is this shape a symmetrical figure? Yes No Explain your answer. 2.
Consolidation Work This triangle has…………… line(s) of symmetry. 2 1 3 3 3.
Consolidation Work Match the following: 4. 4 lines of symmetry No line of symmetry 1 line of symmetry 5 lines of symmetry
How many lines of symmetry does this shape have? Consolidation Work How many lines of symmetry does this shape have? 5.
Consolidation Work Note: Book – Page 88
Which shape is symmetrical? Consolidation Work Which shape is symmetrical? 6. A B C D
The dotted line is a line of symmetry. Consolidation Work The dotted line is a line of symmetry. 7. True A False B
Consolidation Work Which letter is not symmetrical? 8. A. S B. E C. T
Consolidation Work Complete the following words, for which the blue lines are lines of symmetry: 9.
Consolidation Work Arrange the following in the table on the next slide. 10.
Consolidation Work