1. Angles Lesson Objectives: -
To be able to identify, estimate and measure acute and obtuse angles.
To be able to use information we know about angles on a straight line to calculate the missing angles.

2. Can you remember…..????
What do you know about angles on a straight line?
How many degrees do they add up to?
Yes! You’ve got it………………...180°

3. Calculate the missing angle.
94°
86°

4. Calculate the missing angle.
143°
37°

5. Calculate the missing angle.
162°
18°

6. Calculate the missing angle.
72°
71°
37°

7. Calculate the missing angle.
37°
63°
59°
21°

8. Have we reached our objectives?
To be able to identify, estimate and measure acute and obtuse angles.
To be able to use information we know about angles on a straight line to calculate the missing angles.
Discuss how they first used protractors last week and some were able to measure within 5 degrees of accuracy.