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Symmetry

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:

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Symmetry

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  1. Symmetry

  2. 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 

  3. Objectives • At the of this section, students should be able to: • Identify and draw a line of symmetry • Complete symmetrical figures • Identify symmetrical figures

  4. 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.

  5. Activity 1-Painting Note: Ask students to unfold their papers. Ask them what they have observed-Discussion

  6. Discussion

  7. 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.

  8. 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.

  9. Activity 2 A figure which has line(s) of symmetry is known as a symmetrical figure.

  10. 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

  11. Consolidation Work Note: Book – Page 87

  12. Let’s Practice – Activity 4 Complete the shading of this symmetrical figure.

  13. Activity 5 Complete the shape which has one line of symmetry

  14. Activity 6 Complete the shape to be able satisfy the line of symmetry

  15. Activity 7 Complete the shading to be able satisfy the line of symmetry

  16. More than one line of symmetry Let’s discuss: Can a shape have more than one line of symmetry? Let us take a flower.

  17. More than one line of symmetry

  18. More than one line of symmetry Try others by yourself 

  19. More than one line of symmetry One Two Three Four Five

  20. Consolidation Work Note: Book – Page 87

  21. Consolidation Work • A square has…………… line(s) of symmetry. • 2 • 1 • 4 • 3 1.

  22. Consolidation Work 2. • Is this shape a symmetrical figure? • Yes • No • Explain your answer.

  23. Consolidation Work 3. This triangle has…………… line(s) of symmetry. 2 1 0 3

  24. Consolidation Work 4. Match the following: • 4 lines of symmetry • No line of symmetry • 1 line of symmetry • 5 lines of symmetry

  25. Consolidation Work How many lines of symmetry does this shape have? 5.

  26. Consolidation Work Note: Book – Page 88

  27. Consolidation Work Which shape is symmetrical? 6. A B C D

  28. Consolidation Work The dotted line is a line of symmetry. 7. False B A True

  29. Consolidation Work 8. Which letter is not symmetrical? A. S B. E C. T H D.

  30. Consolidation Work 9. Complete the following words, for which the blue lines are lines of symmetry:

  31. Consolidation Work 10. Arrange the following in the table on the next slide.

  32. Consolidation Work

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