Types of angles
- 1. Angles Recognising different types of angles
- 2. What type of angle is this? Right angle
- 3. What type of angle is this? acute
- 4. What type of angle is this? obtuse
- 5. What type of angle is this? acute
- 6. What type of angle is this? reflex
- 7. What type of angle is this? obtuse
- 8. A reminder Right angles are 90o . Acute angles are less than 90o . Obtuse angles are more than 90o but less than 180o . Reflex angles are more than 180o .
- 9. Our objectives: To be able to identify, estimate, measure and order acute and obtuse angles. To improve our accuracy when using protractors.
- 10. Our objectives: To be able to identify, estimate, measure and order acute and obtuse angles. To improve our accuracy when using protractors.
Editor's Notes
- Ask them how many degrees are in a right angle.
- Is it more or less than a right angle?
- Is it more or less than a right angle?
- Show triangles after this part and estimate their angles as a class writing their responses on the board.
- Discuss how they first used protractors last week and some were able to measure within 5 degrees of accuracy.
- Discuss how they first used protractors last week and some were able to measure within 5 degrees of accuracy.