Angle a-trons.pptx
?Download as PPTX, PDF?
1 like?3,219 views
This document describes an activity called "Angle-a-trons" where students fold paper to create models that represent different angles. By making folds of 180, 90, 45 degrees and so on, students can construct angle models without using a protractor. The lesson has students work in groups to draw pictures using their angle models and rulers, with the goal of helping students learn to visualize common angles.
Angle a-trons.pptx
- 2. I got inspiration for this class from a video on Khan academy called ¡°Angle-a trons¡± Link for this video: https://www.khanacademy.org/math/recreational-math/vi-hart/spirals-fibonacci/v/angle-a-trons
- 3. What does the word ¡°angle-a-trons¡± means? ? the suffix "-tron" denotes a complex scientific instrument ? angle models made of paper
- 4. Description of the lesson
- 5. Are there any angles on this piece of paper?
- 6. 90¡ã angle 180¡ã angle
- 7. What about this irregular piece of paper?
- 8. With one fold we can turn it into 180¡ã angle-a-tron
- 9. 90¡ã angle we can get by folding a 180¡ã angle-a-tron in half
- 10. 45¡ã angle we can get by folding a 90¡ã angle-a-tron in half
- 11. 22,5¡ã angle we can get by folding a 45¡ã angle-a-tron in half
- 12. and so on¡
- 13. It¡¯s not hard to fold the paper in thirds either
- 14. We can get an angle of 60¡ã by folding 180¡ã on three equal parts
- 16. By folding 60¡ã angle-a-tron into half we can get an angle of 30¡ã
- 17. Then we get an angle of 15¡ã by folding 30¡ã angle-a-tron in half
- 18. We can add them together¡
- 19. We can put two angles of 60¡ã together to get 120¡ã angle-a-tron
- 20. We can get 135¡ã by adding 90¡ã and 45¡ã
- 21. Together with students we make all angle models from paper. Students check the angles with their protractors after they make the models.
- 23. Students are divided into four groups
- 24. Every student draws a picture, using just one ruler and angle-a-trons which they made. If they have time, they can colour the drawings. Students can help each other .
- 25. Group 1: Use angle-a-tron of 90¡ã
- 26. Group 2: Use angle-a-trons of 90¡ã and 45¡ã
- 27. Group 3: Use angle-a-tron of 60¡ã
- 28. Group 4: Use angle-a-tron of 120¡ã
- 29. Every group chooses the best drawing which will be displayed on the classroom wall.
- 30. Summary
- 31. I remembered when I was a student that my teacher showed us how to make angle-a-trons. We usually don`t carry around a protractor, so this can be useful to the students because they can make their own angle models. In the same time, students can see the size of the most used angles 180¡ã, 90¡ã, 45¡ã; ...,60¡ã, 30¡ã, 15¡ã,...
- 32. I think the students will specially like the drawing activity using rulers and angle-a-trons made of paper.