1. Angles… our

2. Come and meet the Angle family...
The Angles
Come and meet the Angle family...

3. “Hi! We’re the Angles, we’re one family, but all very different, so let us tell you a bit about ourselves!”

4. Mr. Obtuse Angle
This is Obtuse. He’s the husband of the family. He’s bigger than Right and Acute. He’s always inside, and he always measures between 90° and 180° (depending on how much dinner he’s eaten!)

5. Mrs. Right Angle
This is me. I’m Mrs. Right Angle. I always measure 90°, my favourite shape is a square, and whatsmore, no matter what my husband tells you, I’m always right!

6. Baby Acute Angle
This is baby Acute angle. Isn’t he cute?! He loves a hug, and always has his arms out for cuddles! He’s the smallest of the family, measuring less than 90°.

7. Reflex Angle
This is our pet dog, Reflex. He’s always outside. He’s only a pup at the moment so he measures 180°, but he can grow up to 360 °! So he’s definitely the biggest angle. You’ll never see him without that ball in his mouth either, horrid thing!

8. Right on
Right angles

9. Is this a right angle?
Yes No

10. Have another look.

11. Is this a right angle?
Yes

13. Does this shape have a right angle?
Yes No

14. Have another look.

15. Does this shape have a right angle?
Yes
Does this shape have a right angle?

16. Compass Work

17. Anticlockwise rotations
Using your Compass N
Clockwise rotations
and
Anticlockwise rotations W E S

19. Naming Angles

20. Acute Angle
Acute angles are less than 90o.

21. Right Angle
Right angles are 90o

22. Obtuse Angle
Obtuse angles are more than 90o but less than 180o.

23. Straight Angle
Straight angles are180º.

24. Reflex Angle
Reflex angles are more than 180o.

25. What type of angle is it?

26. L.O angles quiz ?
obtuse
acute
reflex
right

27. L.O angles quiz ?
obtuse
acute
reflex
right

28. L.O angles quiz ?
obtuse
acute
reflex
right

29. L.O angles quiz ?
obtuse
acute
reflex
right

30. L.O angles quiz ?
obtuse
acute
reflex
right

31. L.O angles quiz ?
obtuse
acute
reflex
right

32. L.O angles quiz ?
obtuse
acute
reflex
right

33. L.O angles quiz ?
obtuse
acute
reflex
right

34. What does it measure?
This angle measures 35°.

35. Measuring, calculating and drawing angles...
Our learning objectives today
To use a protractor to:
measure acute and obtuse angles to the nearest degree.
draw acute and obtuse angles to the nearest degree.
To calculate angles on a straight line.

36. Vocabulary Angle Clockwise 180º Right Angle Anti-Clockwise 90º Degrees
Horizontal
270º
Position
Vertical
45º
Direction
Grid
North
Turn
East
Compass
South
Whole turn
West
360º