1. Why is it important to ESTIMATE angles?
To guide you when you MEASURE the angle!
If we identify the angle to be an acute angle
Let’s say we estimate that it is about 50° (because an acute angle is between 0 and 90°)
If we measure using a protractor and get an angle of 120° then we must have done something wrong!

2. The Angles Cross 0°
315°
45°
270°
90°
225°
135°
180°

3. Estimate : 90° + a bit more = 110°
Estimating angles: Draw the Cross
Type: Obtuse
Type: Reflex
Type: Obtuse
Estimate : 90° + a bit more = 110°

4. Play against the person sitting next to you at estimating the size of each angle – closest wins

5. Play against the person sitting next to you at estimating the size of each angle – closest wins

6. Play against the person sitting next to you at estimating the size of each angle – closest wins

7. Play against the person sitting next to you at estimating the size of each angle – closest wins

8. Play against the person sitting next to you at estimating the size of each angle – closest wins

9. Play against the person sitting next to you at estimating the size of each angle – closest wins

10. Play against the person sitting next to you at estimating the size of each angle – closest wins

11. Play against the person sitting next to you at estimating the size of each angle – closest wins